diff --git a/.php_cs b/.php_cs
index c40df9c..4bc5c37 100644
--- a/.php_cs
+++ b/.php_cs
@@ -18,9 +18,9 @@ return PhpCsFixer\Config::create()
         '@Symfony' => true,
         'strict_param' => true,
         'array_syntax' => ['syntax' => 'short'],
-        'declare_strict_types' => false, // true
+        'declare_strict_types' => true,
         'no_empty_phpdoc' => true,
-        'no_superfluous_phpdoc_tags' => false, // true
+        'no_superfluous_phpdoc_tags' => true,
         'header_comment' => [
             'commentType' => 'comment',
             'header' => $header,
diff --git a/src/Api/Attachment.php b/src/Api/Attachment.php
index 0e1a171..4de1d52 100644
--- a/src/Api/Attachment.php
+++ b/src/Api/Attachment.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/Domain.php b/src/Api/Domain.php
index d6431b9..c2d0471 100644
--- a/src/Api/Domain.php
+++ b/src/Api/Domain.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -33,8 +35,6 @@ class Domain extends HttpApi
     /**
      * Returns a list of domains on the account.
      *
-     * @param int $limit
-     * @param int $skip
      *
      * @return IndexResponse
      */
diff --git a/src/Api/Event.php b/src/Api/Event.php
index e9f1b4e..b30625b 100644
--- a/src/Api/Event.php
+++ b/src/Api/Event.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -22,9 +24,6 @@ class Event extends HttpApi
     use Pagination;
 
     /**
-     * @param string $domain
-     * @param array  $params
-     *
      * @return EventResponse
      */
     public function get(string $domain, array $params = [])
diff --git a/src/Api/HttpApi.php b/src/Api/HttpApi.php
index 70ab2c9..1bb287a 100644
--- a/src/Api/HttpApi.php
+++ b/src/Api/HttpApi.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -51,9 +53,6 @@ abstract class HttpApi
     }
 
     /**
-     * @param ResponseInterface $response
-     * @param string            $class
-     *
      * @return mixed|ResponseInterface
      *
      * @throws \Exception
@@ -197,8 +196,6 @@ abstract class HttpApi
      * Prepare a set of key-value-pairs to be encoded as multipart/form-data.
      *
      * @param array $parameters Request parameters
-     *
-     * @return array
      */
     private function createRequestBody(array $parameters): array
     {
diff --git a/src/Api/Ip.php b/src/Api/Ip.php
index 3e4daee..a7cb5d5 100644
--- a/src/Api/Ip.php
+++ b/src/Api/Ip.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/MailingList.php b/src/Api/MailingList.php
index 40e422e..a449256 100644
--- a/src/Api/MailingList.php
+++ b/src/Api/MailingList.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/MailingList/Member.php b/src/Api/MailingList/Member.php
index 02fc938..9bd95c7 100644
--- a/src/Api/MailingList/Member.php
+++ b/src/Api/MailingList/Member.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/Message.php b/src/Api/Message.php
index 92c6423..5bd5726 100644
--- a/src/Api/Message.php
+++ b/src/Api/Message.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -58,10 +60,8 @@ class Message extends HttpApi
     }
 
     /**
-     * @param string $domain
      * @param array  $recipients with all you send emails to. Including bcc and cc
      * @param string $message    Message filepath or content
-     * @param array  $params
      *
      * @return SendResponse|ResponseInterface
      */
@@ -94,8 +94,7 @@ class Message extends HttpApi
     /**
      * Get stored message.
      *
-     * @param string $url
-     * @param bool   $rawMessage if true we will use "Accept: message/rfc2822" header
+     * @param bool $rawMessage if true we will use "Accept: message/rfc2822" header
      *
      * @return ShowResponse|ResponseInterface
      */
diff --git a/src/Api/Pagination.php b/src/Api/Pagination.php
index 279dc96..2395517 100644
--- a/src/Api/Pagination.php
+++ b/src/Api/Pagination.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/Route.php b/src/Api/Route.php
index 87d5b62..1c43ac1 100644
--- a/src/Api/Route.php
+++ b/src/Api/Route.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/Stats.php b/src/Api/Stats.php
index d288fca..4e1ca53 100644
--- a/src/Api/Stats.php
+++ b/src/Api/Stats.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/Suppression.php b/src/Api/Suppression.php
index 14b46d7..4bfc0f4 100644
--- a/src/Api/Suppression.php
+++ b/src/Api/Suppression.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/Suppression/Bounce.php b/src/Api/Suppression/Bounce.php
index 8a6e920..7962a21 100644
--- a/src/Api/Suppression/Bounce.php
+++ b/src/Api/Suppression/Bounce.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/Suppression/Complaint.php b/src/Api/Suppression/Complaint.php
index 273ea0a..e0ff7a4 100644
--- a/src/Api/Suppression/Complaint.php
+++ b/src/Api/Suppression/Complaint.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/Suppression/Unsubscribe.php b/src/Api/Suppression/Unsubscribe.php
index 0b7a7e1..db6dbf4 100644
--- a/src/Api/Suppression/Unsubscribe.php
+++ b/src/Api/Suppression/Unsubscribe.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/Tag.php b/src/Api/Tag.php
index 925c435..0d2c149 100644
--- a/src/Api/Tag.php
+++ b/src/Api/Tag.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Api/Webhook.php b/src/Api/Webhook.php
index 4bf2b0a..a599fdd 100644
--- a/src/Api/Webhook.php
+++ b/src/Api/Webhook.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Assert.php b/src/Assert.php
index 929185d..19c1b7f 100644
--- a/src/Assert.php
+++ b/src/Assert.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Exception.php b/src/Exception.php
index a0b34e4..9365681 100644
--- a/src/Exception.php
+++ b/src/Exception.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Exception/HttpClientException.php b/src/Exception/HttpClientException.php
index bd32467..85e6bd6 100644
--- a/src/Exception/HttpClientException.php
+++ b/src/Exception/HttpClientException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Exception/HttpServerException.php b/src/Exception/HttpServerException.php
index ff701d5..214b3a7 100644
--- a/src/Exception/HttpServerException.php
+++ b/src/Exception/HttpServerException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Exception/HydrationException.php b/src/Exception/HydrationException.php
index b01ddb0..1518328 100644
--- a/src/Exception/HydrationException.php
+++ b/src/Exception/HydrationException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Exception/InvalidArgumentException.php b/src/Exception/InvalidArgumentException.php
index 4cdacbc..70e4570 100644
--- a/src/Exception/InvalidArgumentException.php
+++ b/src/Exception/InvalidArgumentException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Exception/UnknownErrorException.php b/src/Exception/UnknownErrorException.php
index 83d4daf..0268f5c 100644
--- a/src/Exception/UnknownErrorException.php
+++ b/src/Exception/UnknownErrorException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/HttpClient/HttpClientConfigurator.php b/src/HttpClient/HttpClientConfigurator.php
index cf74a12..60f6f51 100644
--- a/src/HttpClient/HttpClientConfigurator.php
+++ b/src/HttpClient/HttpClientConfigurator.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/HttpClient/Plugin/History.php b/src/HttpClient/Plugin/History.php
index f655fbb..2934071 100644
--- a/src/HttpClient/Plugin/History.php
+++ b/src/HttpClient/Plugin/History.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/HttpClient/Plugin/ReplaceUriPlugin.php b/src/HttpClient/Plugin/ReplaceUriPlugin.php
index 44cd353..3fb9827 100644
--- a/src/HttpClient/Plugin/ReplaceUriPlugin.php
+++ b/src/HttpClient/Plugin/ReplaceUriPlugin.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -25,9 +27,6 @@ final class ReplaceUriPlugin implements Plugin
      */
     private $uri;
 
-    /**
-     * @param UriInterface $uri
-     */
     public function __construct(UriInterface $uri)
     {
         $this->uri = $uri;
diff --git a/src/HttpClient/RequestBuilder.php b/src/HttpClient/RequestBuilder.php
index 4027c80..7885479 100644
--- a/src/HttpClient/RequestBuilder.php
+++ b/src/HttpClient/RequestBuilder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -32,17 +34,14 @@ class RequestBuilder
     /**
      * Creates a new PSR-7 request.
      *
-     * @param string            $method
-     * @param string            $uri
-     * @param array             $headers
-     * @param array|string|null $body    Request body. If body is an array we will send a as multipart stream request.
-     *                                   If array, each array *item* MUST look like:
-     *                                   array (
-     *                                   'content' => string|resource|StreamInterface,
-     *                                   'name'    => string,
-     *                                   'filename'=> string (optional)
-     *                                   'headers' => array (optinal) ['header-name' => 'header-value']
-     *                                   )
+     * @param array|string|null $body Request body. If body is an array we will send a as multipart stream request.
+     *                                If array, each array *item* MUST look like:
+     *                                array (
+     *                                'content' => string|resource|StreamInterface,
+     *                                'name'    => string,
+     *                                'filename'=> string (optional)
+     *                                'headers' => array (optinal) ['header-name' => 'header-value']
+     *                                )
      *
      * @return RequestInterface
      */
diff --git a/src/Hydrator/ArrayHydrator.php b/src/Hydrator/ArrayHydrator.php
index 80f00e7..5b453e4 100644
--- a/src/Hydrator/ArrayHydrator.php
+++ b/src/Hydrator/ArrayHydrator.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Hydrator/Hydrator.php b/src/Hydrator/Hydrator.php
index 6eedba7..6819dc3 100644
--- a/src/Hydrator/Hydrator.php
+++ b/src/Hydrator/Hydrator.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -18,8 +20,6 @@ use Psr\Http\Message\ResponseInterface;
 interface Hydrator
 {
     /**
-     * @return mixed
-     *
      * @throws HydrationException
      */
     public function hydrate(ResponseInterface $response, string $class);
diff --git a/src/Hydrator/ModelHydrator.php b/src/Hydrator/ModelHydrator.php
index f8be980..b0f793d 100644
--- a/src/Hydrator/ModelHydrator.php
+++ b/src/Hydrator/ModelHydrator.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Hydrator/NoopHydrator.php b/src/Hydrator/NoopHydrator.php
index 0d8afb2..72ad2ed 100644
--- a/src/Hydrator/NoopHydrator.php
+++ b/src/Hydrator/NoopHydrator.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Mailgun.php b/src/Mailgun.php
index dac2a3f..091bd0e 100644
--- a/src/Mailgun.php
+++ b/src/Mailgun.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Message/BatchMessage.php b/src/Message/BatchMessage.php
index 5392bc8..86af2d7 100644
--- a/src/Message/BatchMessage.php
+++ b/src/Message/BatchMessage.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -55,9 +57,7 @@ class BatchMessage extends MessageBuilder
     }
 
     /**
-     * @param string $headerName
-     * @param string $address
-     * @param array  $variables  {
+     * @param array $variables {
      *
      *     @var string $id
      *     @var string $full_name
@@ -100,26 +100,34 @@ class BatchMessage extends MessageBuilder
 
         if (empty($this->domain)) {
             throw new RuntimeException('You must call BatchMessage::setDomain before sending messages.');
-        } elseif (empty($message['from'])) {
-            throw MissingRequiredParameter::create('from');
-        } elseif (empty($message['to'])) {
-            throw MissingRequiredParameter::create('to');
-        } elseif (empty($message['subject'])) {
-            throw MissingRequiredParameter::create('subject');
-        } elseif (empty($message['text']) && empty($message['html'])) {
-            throw MissingRequiredParameter::create('text" or "html');
-        } else {
-            $message['recipient-variables'] = json_encode($this->batchRecipientAttributes);
-            $response = $this->api->send($this->domain, $message);
-
-            $this->batchRecipientAttributes = [];
-            $this->counters['recipients']['to'] = 0;
-            $this->counters['recipients']['cc'] = 0;
-            $this->counters['recipients']['bcc'] = 0;
-            unset($this->message['to']);
-
-            $this->messageIds[] = $response->getId();
         }
+
+        if (empty($message['from'])) {
+            throw MissingRequiredParameter::create('from');
+        }
+
+        if (empty($message['to'])) {
+            throw MissingRequiredParameter::create('to');
+        }
+
+        if (empty($message['subject'])) {
+            throw MissingRequiredParameter::create('subject');
+        }
+
+        if (empty($message['text']) && empty($message['html'])) {
+            throw MissingRequiredParameter::create('text" or "html');
+        }
+
+        $message['recipient-variables'] = json_encode($this->batchRecipientAttributes);
+        $response = $this->api->send($this->domain, $message);
+
+        $this->batchRecipientAttributes = [];
+        $this->counters['recipients']['to'] = 0;
+        $this->counters['recipients']['cc'] = 0;
+        $this->counters['recipients']['bcc'] = 0;
+        unset($this->message['to']);
+
+        $this->messageIds[] = $response->getId();
     }
 
     /**
diff --git a/src/Message/Exceptions/LimitExceeded.php b/src/Message/Exceptions/LimitExceeded.php
index 4463d1d..fae151d 100644
--- a/src/Message/Exceptions/LimitExceeded.php
+++ b/src/Message/Exceptions/LimitExceeded.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Message/Exceptions/MissingRequiredParameter.php b/src/Message/Exceptions/MissingRequiredParameter.php
index 832d5c8..a4925f1 100644
--- a/src/Message/Exceptions/MissingRequiredParameter.php
+++ b/src/Message/Exceptions/MissingRequiredParameter.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Message/Exceptions/RuntimeException.php b/src/Message/Exceptions/RuntimeException.php
index 25d6d32..954f292 100644
--- a/src/Message/Exceptions/RuntimeException.php
+++ b/src/Message/Exceptions/RuntimeException.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Message/Exceptions/TooManyRecipients.php b/src/Message/Exceptions/TooManyRecipients.php
index a2bdaca..29f47a3 100644
--- a/src/Message/Exceptions/TooManyRecipients.php
+++ b/src/Message/Exceptions/TooManyRecipients.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Message/MessageBuilder.php b/src/Message/MessageBuilder.php
index 5385ebf..22d1b22 100644
--- a/src/Message/MessageBuilder.php
+++ b/src/Message/MessageBuilder.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -55,13 +57,6 @@ class MessageBuilder
         ],
     ];
 
-    /**
-     * @param array  $params
-     * @param string $key
-     * @param mixed  $default
-     *
-     * @return mixed
-     */
     private function get(array $params, string $key, $default)
     {
         if (array_key_exists($key, $params)) {
@@ -89,10 +84,7 @@ class MessageBuilder
     }
 
     /**
-     * @param string $address
-     * @param array  $params  {
-     *
-     *     @var string $full_name
+     *     @var string
      *     @var string $first
      *     @var string $last
      * }
@@ -108,9 +100,7 @@ class MessageBuilder
     }
 
     /**
-     * @param string $headerName
-     * @param string $address
-     * @param array  $variables  {
+     * @param array $variables {
      *
      *     @var string $full_name
      *     @var string $first
@@ -136,8 +126,7 @@ class MessageBuilder
     }
 
     /**
-     * @param string $address
-     * @param array  $variables {
+     * @param array $variables {
      *
      *     @var string $id If used with BatchMessage
      *     @var string $full_name
@@ -158,8 +147,7 @@ class MessageBuilder
     }
 
     /**
-     * @param string $address
-     * @param array  $variables {
+     * @param array $variables {
      *
      *     @var string $id If used with BatchMessage
      *     @var string $full_name
@@ -181,8 +169,7 @@ class MessageBuilder
     }
 
     /**
-     * @param string $address
-     * @param array  $variables {
+     * @param array $variables {
      *
      *     @var string $id If used with BatchMessage
      *     @var string $full_name
@@ -204,8 +191,7 @@ class MessageBuilder
     }
 
     /**
-     * @param string $address
-     * @param array  $variables {
+     * @param array $variables {
      *
      *     @var string $id If used with BatchMessage
      *     @var string $full_name
@@ -221,8 +207,7 @@ class MessageBuilder
     }
 
     /**
-     * @param string $address
-     * @param array  $variables {
+     * @param array $variables {
      *
      *     @var string $id If used with BatchMessage
      *     @var string $full_name
@@ -244,10 +229,6 @@ class MessageBuilder
         return $this;
     }
 
-    /**
-     * @param string $headerName
-     * @param mixed  $headerData
-     */
     public function addCustomHeader(string $headerName, $headerData): self
     {
         if (!preg_match('/^h:/i', $headerName)) {
@@ -397,10 +378,6 @@ class MessageBuilder
         return $this;
     }
 
-    /**
-     * @param string $customName
-     * @param mixed  $data
-     */
     public function addCustomData(string $customName, $data): self
     {
         $this->message['v:'.$customName] = json_encode($data);
@@ -408,10 +385,6 @@ class MessageBuilder
         return $this;
     }
 
-    /**
-     * @param string $parameterName
-     * @param mixed  $data
-     */
     public function addCustomParameter(string $parameterName, $data): self
     {
         if (isset($this->message[$parameterName])) {
diff --git a/src/Model/ApiResponse.php b/src/Model/ApiResponse.php
index aa22485..82a86b5 100644
--- a/src/Model/ApiResponse.php
+++ b/src/Model/ApiResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -17,7 +19,6 @@ interface ApiResponse
     /**
      * Create an API response object from the HTTP response from the API server.
      *
-     * @param array $data
      *
      * @return self
      */
diff --git a/src/Model/Attachment/Attachment.php b/src/Model/Attachment/Attachment.php
index 80e3976..85a9799 100644
--- a/src/Model/Attachment/Attachment.php
+++ b/src/Model/Attachment/Attachment.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Domain/AbstractDomainResponse.php b/src/Model/Domain/AbstractDomainResponse.php
index 0b7b67d..5078b19 100644
--- a/src/Model/Domain/AbstractDomainResponse.php
+++ b/src/Model/Domain/AbstractDomainResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -37,8 +39,6 @@ abstract class AbstractDomainResponse implements ApiResponse
     private $outboundDnsRecords;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
@@ -72,7 +72,6 @@ abstract class AbstractDomainResponse implements ApiResponse
     }
 
     /**
-     * @param Domain      $domainInfo
      * @param DnsRecord[] $rxRecords
      * @param DnsRecord[] $txRecords
      * @param string      $message
diff --git a/src/Model/Domain/ConnectionResponse.php b/src/Model/Domain/ConnectionResponse.php
index 44365df..0d41e1a 100644
--- a/src/Model/Domain/ConnectionResponse.php
+++ b/src/Model/Domain/ConnectionResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -27,8 +29,6 @@ final class ConnectionResponse implements ApiResponse
     private $requireTLS;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Domain/CreateCredentialResponse.php b/src/Model/Domain/CreateCredentialResponse.php
index c35d803..08a2d2d 100644
--- a/src/Model/Domain/CreateCredentialResponse.php
+++ b/src/Model/Domain/CreateCredentialResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -30,8 +32,6 @@ final class CreateCredentialResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Domain/CreateResponse.php b/src/Model/Domain/CreateResponse.php
index 4b534d5..d60b875 100644
--- a/src/Model/Domain/CreateResponse.php
+++ b/src/Model/Domain/CreateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Domain/CredentialResponse.php b/src/Model/Domain/CredentialResponse.php
index ffb6645..ddb9253 100644
--- a/src/Model/Domain/CredentialResponse.php
+++ b/src/Model/Domain/CredentialResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -27,8 +29,6 @@ final class CredentialResponse implements ApiResponse
     private $items;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Domain/CredentialResponseItem.php b/src/Model/Domain/CredentialResponseItem.php
index fea8414..de232d0 100644
--- a/src/Model/Domain/CredentialResponseItem.php
+++ b/src/Model/Domain/CredentialResponseItem.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -35,8 +37,6 @@ final class CredentialResponseItem
     private $login;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
@@ -50,10 +50,9 @@ final class CredentialResponseItem
     }
 
     /**
-     * @param int       $sizeBytes
-     * @param \DateTime $createdAt
-     * @param string    $mailbox
-     * @param string    $login
+     * @param int    $sizeBytes
+     * @param string $mailbox
+     * @param string $login
      */
     private function __construct($sizeBytes, \DateTime $createdAt, $mailbox, $login)
     {
diff --git a/src/Model/Domain/DeleteCredentialResponse.php b/src/Model/Domain/DeleteCredentialResponse.php
index a894cf6..a1305ca 100644
--- a/src/Model/Domain/DeleteCredentialResponse.php
+++ b/src/Model/Domain/DeleteCredentialResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -44,8 +46,6 @@ final class DeleteCredentialResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Domain/DeleteResponse.php b/src/Model/Domain/DeleteResponse.php
index 431fd9c..a3cbf71 100644
--- a/src/Model/Domain/DeleteResponse.php
+++ b/src/Model/Domain/DeleteResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -37,8 +39,6 @@ final class DeleteResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Domain/DnsRecord.php b/src/Model/Domain/DnsRecord.php
index 50becbc..4c71b19 100644
--- a/src/Model/Domain/DnsRecord.php
+++ b/src/Model/Domain/DnsRecord.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -47,8 +49,6 @@ final class DnsRecord
     private $cached;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Domain/Domain.php b/src/Model/Domain/Domain.php
index e5bff6e..1d3c385 100644
--- a/src/Model/Domain/Domain.php
+++ b/src/Model/Domain/Domain.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -52,8 +54,6 @@ final class Domain
     private $state;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
@@ -70,13 +70,12 @@ final class Domain
     }
 
     /**
-     * @param string    $name
-     * @param string    $smtpLogin
-     * @param string    $smtpPassword
-     * @param bool      $wildcard
-     * @param string    $spamAction
-     * @param string    $state
-     * @param \DateTime $createdAt
+     * @param string $name
+     * @param string $smtpLogin
+     * @param string $smtpPassword
+     * @param bool   $wildcard
+     * @param string $spamAction
+     * @param string $state
      */
     private function __construct($name, $smtpLogin, $smtpPassword, $wildcard, $spamAction, $state, \DateTime $createdAt)
     {
diff --git a/src/Model/Domain/IndexResponse.php b/src/Model/Domain/IndexResponse.php
index af8b5fd..17a9ca6 100644
--- a/src/Model/Domain/IndexResponse.php
+++ b/src/Model/Domain/IndexResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -27,8 +29,6 @@ final class IndexResponse implements ApiResponse
     private $items;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Domain/ShowResponse.php b/src/Model/Domain/ShowResponse.php
index badcf01..7db90c2 100644
--- a/src/Model/Domain/ShowResponse.php
+++ b/src/Model/Domain/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -32,8 +34,6 @@ final class ShowResponse implements ApiResponse
     private $outboundDnsRecords;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
@@ -62,7 +62,6 @@ final class ShowResponse implements ApiResponse
     }
 
     /**
-     * @param Domain      $domainInfo
      * @param DnsRecord[] $rxRecords
      * @param DnsRecord[] $txRecords
      */
diff --git a/src/Model/Domain/UpdateConnectionResponse.php b/src/Model/Domain/UpdateConnectionResponse.php
index c425368..e6281a6 100644
--- a/src/Model/Domain/UpdateConnectionResponse.php
+++ b/src/Model/Domain/UpdateConnectionResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -32,8 +34,6 @@ final class UpdateConnectionResponse implements ApiResponse
     private $requireTLS;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Domain/UpdateCredentialResponse.php b/src/Model/Domain/UpdateCredentialResponse.php
index 83c8183..8cb0543 100644
--- a/src/Model/Domain/UpdateCredentialResponse.php
+++ b/src/Model/Domain/UpdateCredentialResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -30,8 +32,6 @@ final class UpdateCredentialResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Domain/VerifyResponse.php b/src/Model/Domain/VerifyResponse.php
index de6e169..c45ff54 100644
--- a/src/Model/Domain/VerifyResponse.php
+++ b/src/Model/Domain/VerifyResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Event/Event.php b/src/Model/Event/Event.php
index acc3c78..28f02d0 100644
--- a/src/Model/Event/Event.php
+++ b/src/Model/Event/Event.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -136,8 +138,6 @@ final class Event
     }
 
     /**
-     * @param array $data
-     *
      * @return Event
      */
     public static function create(array $data)
diff --git a/src/Model/Event/EventResponse.php b/src/Model/Event/EventResponse.php
index 9bdf369..44c53d4 100644
--- a/src/Model/Event/EventResponse.php
+++ b/src/Model/Event/EventResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -27,7 +29,6 @@ final class EventResponse implements ApiResponse, PagingProvider
 
     /**
      * @param Event[] $items
-     * @param array   $paging
      */
     private function __construct(array $items, array $paging)
     {
diff --git a/src/Model/Ip/IndexResponse.php b/src/Model/Ip/IndexResponse.php
index 4944784..f72f14d 100644
--- a/src/Model/Ip/IndexResponse.php
+++ b/src/Model/Ip/IndexResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Ip/ShowResponse.php b/src/Model/Ip/ShowResponse.php
index 86180fe..e86e4ff 100644
--- a/src/Model/Ip/ShowResponse.php
+++ b/src/Model/Ip/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Ip/UpdateResponse.php b/src/Model/Ip/UpdateResponse.php
index cfa74ef..0f9c136 100644
--- a/src/Model/Ip/UpdateResponse.php
+++ b/src/Model/Ip/UpdateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/MailingList/CreateResponse.php b/src/Model/MailingList/CreateResponse.php
index 1328272..0f62ad5 100644
--- a/src/Model/MailingList/CreateResponse.php
+++ b/src/Model/MailingList/CreateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -24,8 +26,6 @@ final class CreateResponse implements ApiResponse
     private $list;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/MailingList/DeleteResponse.php b/src/Model/MailingList/DeleteResponse.php
index 492262f..ddd64ef 100644
--- a/src/Model/MailingList/DeleteResponse.php
+++ b/src/Model/MailingList/DeleteResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/MailingList/MailingList.php b/src/Model/MailingList/MailingList.php
index af9c42d..4868223 100644
--- a/src/Model/MailingList/MailingList.php
+++ b/src/Model/MailingList/MailingList.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -44,8 +46,6 @@ final class MailingList implements ApiResponse
     private $createdAt;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
@@ -63,12 +63,11 @@ final class MailingList implements ApiResponse
     /**
      * MailingList constructor.
      *
-     * @param string    $name
-     * @param string    $address
-     * @param string    $accessLevel
-     * @param string    $description
-     * @param int       $membersCount
-     * @param \DateTime $createdAt
+     * @param string $name
+     * @param string $address
+     * @param string $accessLevel
+     * @param string $description
+     * @param int    $membersCount
      */
     private function __construct($name, $address, $accessLevel, $description, $membersCount, \DateTime $createdAt)
     {
diff --git a/src/Model/MailingList/Member/CreateResponse.php b/src/Model/MailingList/Member/CreateResponse.php
index 78ad7d0..33dd4ef 100644
--- a/src/Model/MailingList/Member/CreateResponse.php
+++ b/src/Model/MailingList/Member/CreateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -34,7 +36,6 @@ final class CreateResponse implements ApiResponse
     /**
      * CreateMemberResponse constructor.
      *
-     * @param Member $member
      * @param string $message
      */
     private function __construct(Member $member, $message)
diff --git a/src/Model/MailingList/Member/DeleteResponse.php b/src/Model/MailingList/Member/DeleteResponse.php
index a674bd9..8acd17c 100644
--- a/src/Model/MailingList/Member/DeleteResponse.php
+++ b/src/Model/MailingList/Member/DeleteResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -34,7 +36,6 @@ final class DeleteResponse implements ApiResponse
     /**
      * DeleteMemberResponse constructor.
      *
-     * @param Member $member
      * @param string $message
      */
     private function __construct(Member $member, $message)
diff --git a/src/Model/MailingList/Member/IndexResponse.php b/src/Model/MailingList/Member/IndexResponse.php
index f5ca264..e3377fe 100644
--- a/src/Model/MailingList/Member/IndexResponse.php
+++ b/src/Model/MailingList/Member/IndexResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -23,8 +25,6 @@ final class IndexResponse implements ApiResponse, PagingProvider
     private $items;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
@@ -42,7 +42,6 @@ final class IndexResponse implements ApiResponse, PagingProvider
 
     /**
      * @param Member[] $items
-     * @param array    $paging
      */
     private function __construct(array $items, array $paging)
     {
diff --git a/src/Model/MailingList/Member/Member.php b/src/Model/MailingList/Member/Member.php
index f60f53a..fe6e9e7 100644
--- a/src/Model/MailingList/Member/Member.php
+++ b/src/Model/MailingList/Member/Member.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -34,8 +36,6 @@ final class Member implements ApiResponse
     private $subscribed;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/MailingList/Member/ShowResponse.php b/src/Model/MailingList/Member/ShowResponse.php
index 9de59d1..b65fc69 100644
--- a/src/Model/MailingList/Member/ShowResponse.php
+++ b/src/Model/MailingList/Member/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/MailingList/Member/UpdateResponse.php b/src/Model/MailingList/Member/UpdateResponse.php
index 048bb3b..e017caf 100644
--- a/src/Model/MailingList/Member/UpdateResponse.php
+++ b/src/Model/MailingList/Member/UpdateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -34,7 +36,6 @@ final class UpdateResponse implements ApiResponse
     /**
      * UpdateMemberResponse constructor.
      *
-     * @param Member $member
      * @param string $message
      */
     private function __construct(Member $member, $message)
diff --git a/src/Model/MailingList/PagesResponse.php b/src/Model/MailingList/PagesResponse.php
index 385722d..a0e605f 100644
--- a/src/Model/MailingList/PagesResponse.php
+++ b/src/Model/MailingList/PagesResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -23,8 +25,6 @@ final class PagesResponse implements ApiResponse, PagingProvider
     private $items;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
@@ -42,7 +42,6 @@ final class PagesResponse implements ApiResponse, PagingProvider
 
     /**
      * @param MailingList[] $items
-     * @param array         $paging
      */
     private function __construct(array $items, array $paging)
     {
diff --git a/src/Model/MailingList/ShowResponse.php b/src/Model/MailingList/ShowResponse.php
index bf4149e..922cefe 100644
--- a/src/Model/MailingList/ShowResponse.php
+++ b/src/Model/MailingList/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/MailingList/UpdateResponse.php b/src/Model/MailingList/UpdateResponse.php
index 65aa533..e30d0e6 100644
--- a/src/Model/MailingList/UpdateResponse.php
+++ b/src/Model/MailingList/UpdateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -24,8 +26,6 @@ final class UpdateResponse implements ApiResponse
     private $list;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Message/SendResponse.php b/src/Model/Message/SendResponse.php
index df57ffe..a8cc147 100644
--- a/src/Model/Message/SendResponse.php
+++ b/src/Model/Message/SendResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -37,8 +39,6 @@ final class SendResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return SendResponse
      */
     public static function create(array $data)
diff --git a/src/Model/Message/ShowResponse.php b/src/Model/Message/ShowResponse.php
index 1902d23..feee5bb 100644
--- a/src/Model/Message/ShowResponse.php
+++ b/src/Model/Message/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -103,8 +105,6 @@ final class ShowResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return ShowResponse
      */
     public static function create(array $data)
@@ -392,9 +392,6 @@ final class ShowResponse implements ApiResponse
         return $this->messageHeaders;
     }
 
-    /**
-     * @param array $messageHeaders
-     */
     private function setMessageHeaders(array $messageHeaders)
     {
         $this->messageHeaders = $messageHeaders;
diff --git a/src/Model/PaginationResponse.php b/src/Model/PaginationResponse.php
index 4c56d2d..503b0dc 100644
--- a/src/Model/PaginationResponse.php
+++ b/src/Model/PaginationResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/PagingProvider.php b/src/Model/PagingProvider.php
index 7b24a42..ab79b15 100644
--- a/src/Model/PagingProvider.php
+++ b/src/Model/PagingProvider.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Route/Action.php b/src/Model/Route/Action.php
index 425bc4c..a00a97d 100644
--- a/src/Model/Route/Action.php
+++ b/src/Model/Route/Action.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -22,7 +24,6 @@ final class Action
     /**
      * Action Named Constructor to build several Action DTOs provided by an Array.
      *
-     * @param array $data
      *
      * @return Action[]
      */
diff --git a/src/Model/Route/Response/CreateResponse.php b/src/Model/Route/Response/CreateResponse.php
index f865803..76e71f9 100644
--- a/src/Model/Route/Response/CreateResponse.php
+++ b/src/Model/Route/Response/CreateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -42,7 +44,6 @@ final class CreateResponse implements ApiResponse
      * CreateResponse Private Constructor.
      *
      * @param string|null $message
-     * @param Route|null  $route
      */
     private function __construct($message = null, Route $route = null)
     {
diff --git a/src/Model/Route/Response/DeleteResponse.php b/src/Model/Route/Response/DeleteResponse.php
index 908ffdf..2a615d4 100644
--- a/src/Model/Route/Response/DeleteResponse.php
+++ b/src/Model/Route/Response/DeleteResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -27,8 +29,6 @@ final class DeleteResponse implements ApiResponse
     private $error;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Route/Response/IndexResponse.php b/src/Model/Route/Response/IndexResponse.php
index c6a024d..8feae96 100644
--- a/src/Model/Route/Response/IndexResponse.php
+++ b/src/Model/Route/Response/IndexResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Route/Response/ShowResponse.php b/src/Model/Route/Response/ShowResponse.php
index bf3cefe..49e6152 100644
--- a/src/Model/Route/Response/ShowResponse.php
+++ b/src/Model/Route/Response/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -36,8 +38,6 @@ final class ShowResponse implements ApiResponse
 
     /**
      * ShowResponse constructor.
-     *
-     * @param Route|null $route
      */
     private function __construct(Route $route = null)
     {
diff --git a/src/Model/Route/Response/UpdateResponse.php b/src/Model/Route/Response/UpdateResponse.php
index b167ee3..df75453 100644
--- a/src/Model/Route/Response/UpdateResponse.php
+++ b/src/Model/Route/Response/UpdateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -28,8 +30,6 @@ final class UpdateResponse implements ApiResponse
     private $route;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
@@ -42,7 +42,6 @@ final class UpdateResponse implements ApiResponse
 
     /**
      * @param string|null $message
-     * @param Route|null  $route
      */
     private function __construct($message = null, Route $route = null)
     {
diff --git a/src/Model/Route/Route.php b/src/Model/Route/Route.php
index 11a75e9..ff945f4 100644
--- a/src/Model/Route/Route.php
+++ b/src/Model/Route/Route.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -47,7 +49,6 @@ final class Route
     /**
      * Route Named Constructor.
      *
-     * @param array $data
      *
      * @return Route
      */
diff --git a/src/Model/Stats/AllResponse.php b/src/Model/Stats/AllResponse.php
index 2bd20c9..d6ee408 100644
--- a/src/Model/Stats/AllResponse.php
+++ b/src/Model/Stats/AllResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -37,8 +39,6 @@ final class AllResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Stats/AllResponseItem.php b/src/Model/Stats/AllResponseItem.php
index db3b085..f443498 100644
--- a/src/Model/Stats/AllResponseItem.php
+++ b/src/Model/Stats/AllResponseItem.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -40,8 +42,6 @@ final class AllResponseItem
     private $createdAt;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
@@ -60,7 +60,6 @@ final class AllResponseItem
      * @param string    $event
      * @param string    $totalCount
      * @param \string[] $tags
-     * @param \DateTime $createdAt
      */
     private function __construct($id, $event, $totalCount, array $tags, \DateTime $createdAt)
     {
diff --git a/src/Model/Stats/TotalResponse.php b/src/Model/Stats/TotalResponse.php
index cef5bb5..f6b1d2e 100644
--- a/src/Model/Stats/TotalResponse.php
+++ b/src/Model/Stats/TotalResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -37,8 +39,6 @@ final class TotalResponse implements ApiResponse
     private $stats;
 
     /**
-     * @param \DateTime           $start
-     * @param \DateTime           $end
      * @param string              $resolution
      * @param TotalResponseItem[] $stats
      */
@@ -51,8 +51,6 @@ final class TotalResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
diff --git a/src/Model/Stats/TotalResponseItem.php b/src/Model/Stats/TotalResponseItem.php
index cb39c3d..f91ce0b 100644
--- a/src/Model/Stats/TotalResponseItem.php
+++ b/src/Model/Stats/TotalResponseItem.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -40,8 +42,6 @@ final class TotalResponseItem
     private $complained;
 
     /**
-     * @param array $data
-     *
      * @return self
      */
     public static function create(array $data)
@@ -55,13 +55,6 @@ final class TotalResponseItem
         );
     }
 
-    /**
-     * @param \DateTime $time
-     * @param array     $accepted
-     * @param array     $delivered
-     * @param array     $failed
-     * @param array     $complained
-     */
     private function __construct(\DateTime $time, array $accepted, array $delivered, array $failed, array $complained)
     {
         $this->time = $time;
diff --git a/src/Model/Suppression/BaseResponse.php b/src/Model/Suppression/BaseResponse.php
index 97a2c00..bc5516a 100644
--- a/src/Model/Suppression/BaseResponse.php
+++ b/src/Model/Suppression/BaseResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -39,8 +41,6 @@ abstract class BaseResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return BaseResponse
      */
     public static function create(array $data)
diff --git a/src/Model/Suppression/Bounce/Bounce.php b/src/Model/Suppression/Bounce/Bounce.php
index 5537782..77a8a4d 100644
--- a/src/Model/Suppression/Bounce/Bounce.php
+++ b/src/Model/Suppression/Bounce/Bounce.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -44,8 +46,6 @@ class Bounce
     }
 
     /**
-     * @param array $data
-     *
      * @return Bounce
      */
     public static function create(array $data)
@@ -113,9 +113,6 @@ class Bounce
         return $this->createdAt;
     }
 
-    /**
-     * @param \DateTime $createdAt
-     */
     private function setCreatedAt(\DateTime $createdAt)
     {
         $this->createdAt = $createdAt;
diff --git a/src/Model/Suppression/Bounce/CreateResponse.php b/src/Model/Suppression/Bounce/CreateResponse.php
index 38842ac..65b950d 100644
--- a/src/Model/Suppression/Bounce/CreateResponse.php
+++ b/src/Model/Suppression/Bounce/CreateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Suppression/Bounce/DeleteResponse.php b/src/Model/Suppression/Bounce/DeleteResponse.php
index 8161962..e8355c4 100644
--- a/src/Model/Suppression/Bounce/DeleteResponse.php
+++ b/src/Model/Suppression/Bounce/DeleteResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Suppression/Bounce/IndexResponse.php b/src/Model/Suppression/Bounce/IndexResponse.php
index 31c5e71..8ea1cf3 100644
--- a/src/Model/Suppression/Bounce/IndexResponse.php
+++ b/src/Model/Suppression/Bounce/IndexResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -27,7 +29,6 @@ final class IndexResponse implements ApiResponse, PagingProvider
 
     /**
      * @param Bounce[] $items
-     * @param array    $paging
      */
     private function __construct(array $items, array $paging)
     {
@@ -36,8 +37,6 @@ final class IndexResponse implements ApiResponse, PagingProvider
     }
 
     /**
-     * @param array $data
-     *
      * @return IndexResponse
      */
     public static function create(array $data)
diff --git a/src/Model/Suppression/Bounce/ShowResponse.php b/src/Model/Suppression/Bounce/ShowResponse.php
index 2b4e270..a148f04 100644
--- a/src/Model/Suppression/Bounce/ShowResponse.php
+++ b/src/Model/Suppression/Bounce/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Suppression/Complaint/Complaint.php b/src/Model/Suppression/Complaint/Complaint.php
index bcfb2ad..e3ca6d6 100644
--- a/src/Model/Suppression/Complaint/Complaint.php
+++ b/src/Model/Suppression/Complaint/Complaint.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -34,8 +36,6 @@ class Complaint
     }
 
     /**
-     * @param array $data
-     *
      * @return Complaint
      */
     public static function create(array $data)
@@ -65,9 +65,6 @@ class Complaint
         return $this->createdAt;
     }
 
-    /**
-     * @param \DateTime $createdAt
-     */
     private function setCreatedAt(\DateTime $createdAt)
     {
         $this->createdAt = $createdAt;
diff --git a/src/Model/Suppression/Complaint/CreateResponse.php b/src/Model/Suppression/Complaint/CreateResponse.php
index f480ffd..4a8f909 100644
--- a/src/Model/Suppression/Complaint/CreateResponse.php
+++ b/src/Model/Suppression/Complaint/CreateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Suppression/Complaint/DeleteResponse.php b/src/Model/Suppression/Complaint/DeleteResponse.php
index 97dd9c7..8b79628 100644
--- a/src/Model/Suppression/Complaint/DeleteResponse.php
+++ b/src/Model/Suppression/Complaint/DeleteResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Suppression/Complaint/IndexResponse.php b/src/Model/Suppression/Complaint/IndexResponse.php
index 22f09a5..973e39b 100644
--- a/src/Model/Suppression/Complaint/IndexResponse.php
+++ b/src/Model/Suppression/Complaint/IndexResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -27,7 +29,6 @@ final class IndexResponse implements ApiResponse, PagingProvider
 
     /**
      * @param Complaint[] $items
-     * @param array       $paging
      */
     private function __construct(array $items, array $paging)
     {
@@ -36,8 +37,6 @@ final class IndexResponse implements ApiResponse, PagingProvider
     }
 
     /**
-     * @param array $data
-     *
      * @return IndexResponse
      */
     public static function create(array $data)
diff --git a/src/Model/Suppression/Complaint/ShowResponse.php b/src/Model/Suppression/Complaint/ShowResponse.php
index f9d96c9..1b80b4b 100644
--- a/src/Model/Suppression/Complaint/ShowResponse.php
+++ b/src/Model/Suppression/Complaint/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Suppression/Unsubscribe/CreateResponse.php b/src/Model/Suppression/Unsubscribe/CreateResponse.php
index 529f21a..bf5bccd 100644
--- a/src/Model/Suppression/Unsubscribe/CreateResponse.php
+++ b/src/Model/Suppression/Unsubscribe/CreateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Suppression/Unsubscribe/DeleteResponse.php b/src/Model/Suppression/Unsubscribe/DeleteResponse.php
index 220d438..d2bc0d2 100644
--- a/src/Model/Suppression/Unsubscribe/DeleteResponse.php
+++ b/src/Model/Suppression/Unsubscribe/DeleteResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Suppression/Unsubscribe/IndexResponse.php b/src/Model/Suppression/Unsubscribe/IndexResponse.php
index 61e7a1e..e257b2f 100644
--- a/src/Model/Suppression/Unsubscribe/IndexResponse.php
+++ b/src/Model/Suppression/Unsubscribe/IndexResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -43,7 +45,6 @@ final class IndexResponse implements ApiResponse, PagingProvider
      * @see Mailgun/Model/Suppression/Unsubscribe/Unsubscribe
      *
      * @param Unsubscribe[] $items
-     * @param array         $paging
      */
     private function __construct(array $items, array $paging)
     {
@@ -54,7 +55,6 @@ final class IndexResponse implements ApiResponse, PagingProvider
     /**
      * Allow create the unsubscribe items with paging.
      *
-     * @param array $data
      *
      * @return IndexResponse
      */
diff --git a/src/Model/Suppression/Unsubscribe/ShowResponse.php b/src/Model/Suppression/Unsubscribe/ShowResponse.php
index 67c57f5..b769d0b 100644
--- a/src/Model/Suppression/Unsubscribe/ShowResponse.php
+++ b/src/Model/Suppression/Unsubscribe/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Suppression/Unsubscribe/Unsubscribe.php b/src/Model/Suppression/Unsubscribe/Unsubscribe.php
index 0836428..44195fe 100644
--- a/src/Model/Suppression/Unsubscribe/Unsubscribe.php
+++ b/src/Model/Suppression/Unsubscribe/Unsubscribe.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -39,8 +41,6 @@ class Unsubscribe
     }
 
     /**
-     * @param array $data
-     *
      * @return Unsubscribe
      */
     public static function create(array $data)
@@ -73,9 +73,6 @@ class Unsubscribe
         return $this->createdAt;
     }
 
-    /**
-     * @param \DateTime $createdAt
-     */
     private function setCreatedAt(\DateTime $createdAt)
     {
         $this->createdAt = $createdAt;
diff --git a/src/Model/Tag/DeleteResponse.php b/src/Model/Tag/DeleteResponse.php
index b108980..930f51f 100644
--- a/src/Model/Tag/DeleteResponse.php
+++ b/src/Model/Tag/DeleteResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -30,8 +32,6 @@ final class DeleteResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return DeleteResponse
      */
     public static function create(array $data)
diff --git a/src/Model/Tag/IndexResponse.php b/src/Model/Tag/IndexResponse.php
index 54209fc..a05b689 100644
--- a/src/Model/Tag/IndexResponse.php
+++ b/src/Model/Tag/IndexResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -27,7 +29,6 @@ final class IndexResponse implements ApiResponse, PagingProvider
 
     /**
      * @param Tag[] $items
-     * @param array $paging
      */
     private function __construct(array $items, array $paging)
     {
@@ -36,8 +37,6 @@ final class IndexResponse implements ApiResponse, PagingProvider
     }
 
     /**
-     * @param array $data
-     *
      * @return IndexResponse
      */
     public static function create(array $data)
diff --git a/src/Model/Tag/ShowResponse.php b/src/Model/Tag/ShowResponse.php
index e9fed62..18750e8 100644
--- a/src/Model/Tag/ShowResponse.php
+++ b/src/Model/Tag/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Tag/StatisticsResponse.php b/src/Model/Tag/StatisticsResponse.php
index cd43fb7..a4f5bdb 100644
--- a/src/Model/Tag/StatisticsResponse.php
+++ b/src/Model/Tag/StatisticsResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -47,12 +49,9 @@ final class StatisticsResponse implements ApiResponse
     private $stats;
 
     /**
-     * @param string    $tag
-     * @param string    $description
-     * @param \DateTime $start
-     * @param \DateTime $end
-     * @param string    $resolution
-     * @param array     $stats
+     * @param string $tag
+     * @param string $description
+     * @param string $resolution
      */
     private function __construct($tag, $description, \DateTime $start, \DateTime $end, $resolution, array $stats)
     {
@@ -65,8 +64,6 @@ final class StatisticsResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return StatisticsResponse
      */
     public static function create(array $data)
diff --git a/src/Model/Tag/Tag.php b/src/Model/Tag/Tag.php
index a864610..6357775 100644
--- a/src/Model/Tag/Tag.php
+++ b/src/Model/Tag/Tag.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -46,8 +48,6 @@ class Tag
     }
 
     /**
-     * @param array $data
-     *
      * @return Tag
      */
     public static function create(array $data)
diff --git a/src/Model/Tag/UpdateResponse.php b/src/Model/Tag/UpdateResponse.php
index 2312d3a..0772705 100644
--- a/src/Model/Tag/UpdateResponse.php
+++ b/src/Model/Tag/UpdateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -30,8 +32,6 @@ final class UpdateResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return UpdateResponse
      */
     public static function create(array $data)
diff --git a/src/Model/Webhook/BaseResponse.php b/src/Model/Webhook/BaseResponse.php
index 9e7f6c8..92b3862 100644
--- a/src/Model/Webhook/BaseResponse.php
+++ b/src/Model/Webhook/BaseResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -29,7 +31,6 @@ abstract class BaseResponse implements ApiResponse
     private $message;
 
     /**
-     * @param array  $webhook
      * @param string $message
      */
     private function __construct(array $webhook, $message)
@@ -39,8 +40,6 @@ abstract class BaseResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return static
      */
     public static function create(array $data)
diff --git a/src/Model/Webhook/CreateResponse.php b/src/Model/Webhook/CreateResponse.php
index 83bc60c..45dffad 100644
--- a/src/Model/Webhook/CreateResponse.php
+++ b/src/Model/Webhook/CreateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Webhook/DeleteResponse.php b/src/Model/Webhook/DeleteResponse.php
index 369c6a8..be9dfdd 100644
--- a/src/Model/Webhook/DeleteResponse.php
+++ b/src/Model/Webhook/DeleteResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/src/Model/Webhook/IndexResponse.php b/src/Model/Webhook/IndexResponse.php
index 221ee87..b7dc528 100644
--- a/src/Model/Webhook/IndexResponse.php
+++ b/src/Model/Webhook/IndexResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -59,8 +61,6 @@ final class IndexResponse implements ApiResponse
     }
 
     /**
-     * @param array $data
-     *
      * @return IndexResponse
      */
     public static function create(array $data)
diff --git a/src/Model/Webhook/ShowResponse.php b/src/Model/Webhook/ShowResponse.php
index bafd878..cd3eb4f 100644
--- a/src/Model/Webhook/ShowResponse.php
+++ b/src/Model/Webhook/ShowResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -21,17 +23,12 @@ class ShowResponse implements ApiResponse
      */
     private $webhook = [];
 
-    /**
-     * @param array $webhook
-     */
     private function __construct(array $webhook)
     {
         $this->webhook = $webhook;
     }
 
     /**
-     * @param array $data
-     *
      * @return ShowResponse
      */
     public static function create(array $data)
diff --git a/src/Model/Webhook/UpdateResponse.php b/src/Model/Webhook/UpdateResponse.php
index f50d70b..61aa669 100644
--- a/src/Model/Webhook/UpdateResponse.php
+++ b/src/Model/Webhook/UpdateResponse.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/AttachmentTest.php b/tests/Api/AttachmentTest.php
index 7f1db98..ae3dfe3 100644
--- a/tests/Api/AttachmentTest.php
+++ b/tests/Api/AttachmentTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/DomainTest.php b/tests/Api/DomainTest.php
index 62657c9..cbe23ed 100644
--- a/tests/Api/DomainTest.php
+++ b/tests/Api/DomainTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/EventTest.php b/tests/Api/EventTest.php
index c728c57..f8a0cdd 100644
--- a/tests/Api/EventTest.php
+++ b/tests/Api/EventTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/MailingList/MemberTest.php b/tests/Api/MailingList/MemberTest.php
index 1fd918f..9157468 100644
--- a/tests/Api/MailingList/MemberTest.php
+++ b/tests/Api/MailingList/MemberTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/MailingListTest.php b/tests/Api/MailingListTest.php
index a646f8c..b810ce6 100644
--- a/tests/Api/MailingListTest.php
+++ b/tests/Api/MailingListTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/MessageTest.php b/tests/Api/MessageTest.php
index bcb64fb..b5f66d9 100644
--- a/tests/Api/MessageTest.php
+++ b/tests/Api/MessageTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/RouteTest.php b/tests/Api/RouteTest.php
index 69f9ef0..31fa8cb 100644
--- a/tests/Api/RouteTest.php
+++ b/tests/Api/RouteTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/StatsTest.php b/tests/Api/StatsTest.php
index 4611d64..a009ea3 100644
--- a/tests/Api/StatsTest.php
+++ b/tests/Api/StatsTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/Suppression/BounceTest.php b/tests/Api/Suppression/BounceTest.php
index 3f2bd05..0aded7f 100644
--- a/tests/Api/Suppression/BounceTest.php
+++ b/tests/Api/Suppression/BounceTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/Suppression/ComplaintTest.php b/tests/Api/Suppression/ComplaintTest.php
index 6025798..dd95ab5 100644
--- a/tests/Api/Suppression/ComplaintTest.php
+++ b/tests/Api/Suppression/ComplaintTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/Suppression/UnsubscribeTest.php b/tests/Api/Suppression/UnsubscribeTest.php
index 0a21cf3..c4ec05f 100644
--- a/tests/Api/Suppression/UnsubscribeTest.php
+++ b/tests/Api/Suppression/UnsubscribeTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/SuppressionTest.php b/tests/Api/SuppressionTest.php
index 38d5c65..21a5b26 100644
--- a/tests/Api/SuppressionTest.php
+++ b/tests/Api/SuppressionTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/TagTest.php b/tests/Api/TagTest.php
index 6fd83d8..b7d0898 100644
--- a/tests/Api/TagTest.php
+++ b/tests/Api/TagTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Api/TestCase.php b/tests/Api/TestCase.php
index a85fea3..7b91c76 100644
--- a/tests/Api/TestCase.php
+++ b/tests/Api/TestCase.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -188,8 +190,6 @@ abstract class TestCase extends \PHPUnit\Framework\TestCase
 
     /**
      * The data you want the hydrator to return.
-     *
-     * @param mixed $hydratedResponse
      */
     public function setHydratedResponse($hydratedResponse)
     {
@@ -214,17 +214,11 @@ abstract class TestCase extends \PHPUnit\Framework\TestCase
         $this->requestUri = $requestUri;
     }
 
-    /**
-     * @param array $requestHeaders
-     */
     public function setRequestHeaders(array $requestHeaders)
     {
         $this->requestHeaders = $requestHeaders;
     }
 
-    /**
-     * @param mixed $requestBody
-     */
     public function setRequestBody($requestBody)
     {
         $this->requestBody = $requestBody;
diff --git a/tests/Api/WebhookTest.php b/tests/Api/WebhookTest.php
index c581d0e..1387843 100644
--- a/tests/Api/WebhookTest.php
+++ b/tests/Api/WebhookTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -27,7 +29,7 @@ class WebhookTest extends TestCase
     {
         $api = $this->getApiInstance('key-3ax6xnjp29jd6fds4gc373sgvjxteol0');
 
-        $timestamp = '1403645220';
+        $timestamp = 1403645220;
         $token = '5egbgr1vjgqxtrnp65xfznchgdccwh5d6i09vijqi3whgowmn6';
         $signature = '9cfc5c41582e51246e73c88d34db3af0a3a2692a76fbab81492842f000256d33';
 
@@ -37,7 +39,7 @@ class WebhookTest extends TestCase
     public function testVerifyWebhookBad()
     {
         $api = $this->getApiInstance('key-3ax6xnjp29jd6fds4gc373sgvjxteol0');
-        $timestamp = '1403645220';
+        $timestamp = 1403645220;
         $token = 'owyldpe6nxhmrn78epljl6bj0orrki1u3d2v5e6cnlmmuox8jr';
         $signature = '9cfc5c41582e51246e73c88d34db3af0a3a2692a76fbab81492842f000256d33';
 
diff --git a/tests/Exception/HttpClientExceptionTest.php b/tests/Exception/HttpClientExceptionTest.php
index 33e53d8..0756855 100644
--- a/tests/Exception/HttpClientExceptionTest.php
+++ b/tests/Exception/HttpClientExceptionTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/HttpClient/RequestBuilderTest.php b/tests/HttpClient/RequestBuilderTest.php
index 882a237..bafe9bc 100644
--- a/tests/HttpClient/RequestBuilderTest.php
+++ b/tests/HttpClient/RequestBuilderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/MailgunTestCase.php b/tests/MailgunTestCase.php
index ba763c9..5161538 100644
--- a/tests/MailgunTestCase.php
+++ b/tests/MailgunTestCase.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Message/BatchMessageTest.php b/tests/Message/BatchMessageTest.php
index 625cc11..5923205 100644
--- a/tests/Message/BatchMessageTest.php
+++ b/tests/Message/BatchMessageTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -109,7 +111,7 @@ class BatchMessageTest extends MailgunTestCase
         $this->assertEquals(1, count($message['to']));
     }
 
-    public function testAttributeResetOnEndBatchMessage()
+    public function testRecipientAttributeResetOnEndBatchMessage()
     {
         $this->batchMessage->addToRecipient('test-user@samples.mailgun.org', ['first' => 'Test', 'last' => 'User']);
         $this->batchMessage->setFromAddress('samples@mailgun.org', ['first' => 'Test', 'last' => 'User']);
@@ -117,7 +119,9 @@ class BatchMessageTest extends MailgunTestCase
         $this->batchMessage->setTextBody('This is the text body of the message!');
         $this->batchMessage->finalize();
         $message = NSA::getProperty($this->batchMessage, 'message');
-        $this->assertTrue(true, empty($message));
+
+        $this->assertTrue(empty($message['to']));
+        $this->assertNotEmpty($message);
     }
 
     public function testDefaultIDInVariables()
diff --git a/tests/Message/MessageBuilderTest.php b/tests/Message/MessageBuilderTest.php
index 6891d50..9d50fe8 100644
--- a/tests/Message/MessageBuilderTest.php
+++ b/tests/Message/MessageBuilderTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
@@ -239,14 +241,6 @@ class MessageBuilderTest extends MailgunTestCase
         $this->assertEquals(['o:campaign' => ['ABC123', 'XYZ987', 'TUV456']], $message);
     }
 
-    public function testAddCampaignIdInteger()
-    {
-        $this->messageBuilder->addCampaignId(1111);
-        $this->messageBuilder->addCampaignId(2222);
-        $message = $this->messageBuilder->getMessage();
-        $this->assertSame(['o:campaign' => ['1111', '2222']], $message);
-    }
-
     public function testSetDkim()
     {
         $this->messageBuilder->setDkim(true);
diff --git a/tests/Model/BaseModelTest.php b/tests/Model/BaseModelTest.php
index 562a7e3..79808c7 100644
--- a/tests/Model/BaseModelTest.php
+++ b/tests/Model/BaseModelTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/ConnectionResponseTest.php b/tests/Model/Domain/ConnectionResponseTest.php
index a42b31c..78fecd0 100644
--- a/tests/Model/Domain/ConnectionResponseTest.php
+++ b/tests/Model/Domain/ConnectionResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/CreateCredentialResponseTest.php b/tests/Model/Domain/CreateCredentialResponseTest.php
index 7eaf2a3..59b3fff 100644
--- a/tests/Model/Domain/CreateCredentialResponseTest.php
+++ b/tests/Model/Domain/CreateCredentialResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/CreateResponseTest.php b/tests/Model/Domain/CreateResponseTest.php
index 8977825..fe553a6 100644
--- a/tests/Model/Domain/CreateResponseTest.php
+++ b/tests/Model/Domain/CreateResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/CredentialResponseItemTest.php b/tests/Model/Domain/CredentialResponseItemTest.php
index 8e1512b..6be18bf 100644
--- a/tests/Model/Domain/CredentialResponseItemTest.php
+++ b/tests/Model/Domain/CredentialResponseItemTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/CredentialResponseTest.php b/tests/Model/Domain/CredentialResponseTest.php
index e33f6ca..1467d99 100644
--- a/tests/Model/Domain/CredentialResponseTest.php
+++ b/tests/Model/Domain/CredentialResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/DeleteCredentialResponseTest.php b/tests/Model/Domain/DeleteCredentialResponseTest.php
index 3841c73..b98048f 100644
--- a/tests/Model/Domain/DeleteCredentialResponseTest.php
+++ b/tests/Model/Domain/DeleteCredentialResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/DeleteResponseTest.php b/tests/Model/Domain/DeleteResponseTest.php
index 27bf80b..4397416 100644
--- a/tests/Model/Domain/DeleteResponseTest.php
+++ b/tests/Model/Domain/DeleteResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/DnsRecordTest.php b/tests/Model/Domain/DnsRecordTest.php
index 8f0a9ee..94a4dd4 100644
--- a/tests/Model/Domain/DnsRecordTest.php
+++ b/tests/Model/Domain/DnsRecordTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/DomainTest.php b/tests/Model/Domain/DomainTest.php
index 7db16a8..890dd60 100644
--- a/tests/Model/Domain/DomainTest.php
+++ b/tests/Model/Domain/DomainTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/IndexResponseTest.php b/tests/Model/Domain/IndexResponseTest.php
index ab84b95..d24f2dc 100644
--- a/tests/Model/Domain/IndexResponseTest.php
+++ b/tests/Model/Domain/IndexResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/ShowResponseTest.php b/tests/Model/Domain/ShowResponseTest.php
index 497b525..04782a3 100644
--- a/tests/Model/Domain/ShowResponseTest.php
+++ b/tests/Model/Domain/ShowResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/UpdateConnectionResponseTest.php b/tests/Model/Domain/UpdateConnectionResponseTest.php
index 82f9350..813c7d2 100644
--- a/tests/Model/Domain/UpdateConnectionResponseTest.php
+++ b/tests/Model/Domain/UpdateConnectionResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/UpdateCredentialResponseTest.php b/tests/Model/Domain/UpdateCredentialResponseTest.php
index 9473aa8..7f7d071 100644
--- a/tests/Model/Domain/UpdateCredentialResponseTest.php
+++ b/tests/Model/Domain/UpdateCredentialResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Domain/VerifyResponseTest.php b/tests/Model/Domain/VerifyResponseTest.php
index af6b68a..dd354a4 100644
--- a/tests/Model/Domain/VerifyResponseTest.php
+++ b/tests/Model/Domain/VerifyResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Event/EventResponseTest.php b/tests/Model/Event/EventResponseTest.php
index 8f75f33..8a37fdf 100644
--- a/tests/Model/Event/EventResponseTest.php
+++ b/tests/Model/Event/EventResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Ip/IndexResponseTest.php b/tests/Model/Ip/IndexResponseTest.php
index 6c1bf2c..d9893be 100644
--- a/tests/Model/Ip/IndexResponseTest.php
+++ b/tests/Model/Ip/IndexResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Ip/ShowResponseTest.php b/tests/Model/Ip/ShowResponseTest.php
index 0708100..bbf9b7a 100644
--- a/tests/Model/Ip/ShowResponseTest.php
+++ b/tests/Model/Ip/ShowResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Ip/UpdateResponseTest.php b/tests/Model/Ip/UpdateResponseTest.php
index 61db162..f5816b9 100644
--- a/tests/Model/Ip/UpdateResponseTest.php
+++ b/tests/Model/Ip/UpdateResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/MailingList/CreateResponseTest.php b/tests/Model/MailingList/CreateResponseTest.php
index 12faf34..a3c80bd 100644
--- a/tests/Model/MailingList/CreateResponseTest.php
+++ b/tests/Model/MailingList/CreateResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/MailingList/DeleteResponseTest.php b/tests/Model/MailingList/DeleteResponseTest.php
index 40899e3..545f5df 100644
--- a/tests/Model/MailingList/DeleteResponseTest.php
+++ b/tests/Model/MailingList/DeleteResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/MailingList/Member/CreateResponseTest.php b/tests/Model/MailingList/Member/CreateResponseTest.php
index d58e875..c4a2767 100644
--- a/tests/Model/MailingList/Member/CreateResponseTest.php
+++ b/tests/Model/MailingList/Member/CreateResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/MailingList/Member/DeleteResponseTest.php b/tests/Model/MailingList/Member/DeleteResponseTest.php
index 614d401..00dfafb 100644
--- a/tests/Model/MailingList/Member/DeleteResponseTest.php
+++ b/tests/Model/MailingList/Member/DeleteResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/MailingList/Member/IndexResponseTest.php b/tests/Model/MailingList/Member/IndexResponseTest.php
index 4530eab..8b1dbdd 100644
--- a/tests/Model/MailingList/Member/IndexResponseTest.php
+++ b/tests/Model/MailingList/Member/IndexResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/MailingList/Member/UpdateResponseTest.php b/tests/Model/MailingList/Member/UpdateResponseTest.php
index 4cea23b..f440cc5 100644
--- a/tests/Model/MailingList/Member/UpdateResponseTest.php
+++ b/tests/Model/MailingList/Member/UpdateResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/MailingList/PagesResponseTest.php b/tests/Model/MailingList/PagesResponseTest.php
index 92f6a32..37a45b4 100644
--- a/tests/Model/MailingList/PagesResponseTest.php
+++ b/tests/Model/MailingList/PagesResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/MailingList/UpdateResponseTest.php b/tests/Model/MailingList/UpdateResponseTest.php
index 0bcad8e..5b66d21 100644
--- a/tests/Model/MailingList/UpdateResponseTest.php
+++ b/tests/Model/MailingList/UpdateResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Message/SendResponseTest.php b/tests/Model/Message/SendResponseTest.php
index 32cbffe..8865c77 100644
--- a/tests/Model/Message/SendResponseTest.php
+++ b/tests/Model/Message/SendResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Route/CreateResponseTest.php b/tests/Model/Route/CreateResponseTest.php
index b08fa5c..bc7a0f8 100644
--- a/tests/Model/Route/CreateResponseTest.php
+++ b/tests/Model/Route/CreateResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Route/IndexResponseTest.php b/tests/Model/Route/IndexResponseTest.php
index c4826eb..5914a52 100644
--- a/tests/Model/Route/IndexResponseTest.php
+++ b/tests/Model/Route/IndexResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Route/ShowResponseTest.php b/tests/Model/Route/ShowResponseTest.php
index 8f9ac4f..44ae367 100644
--- a/tests/Model/Route/ShowResponseTest.php
+++ b/tests/Model/Route/ShowResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Stats/TotalResponseTest.php b/tests/Model/Stats/TotalResponseTest.php
index 052e28b..dd595c3 100644
--- a/tests/Model/Stats/TotalResponseTest.php
+++ b/tests/Model/Stats/TotalResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Suppression/Unsubscribe/UnsubscribeTest.php b/tests/Model/Suppression/Unsubscribe/UnsubscribeTest.php
index 635b627..ca70612 100644
--- a/tests/Model/Suppression/Unsubscribe/UnsubscribeTest.php
+++ b/tests/Model/Suppression/Unsubscribe/UnsubscribeTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Tag/IndexResponseTest.php b/tests/Model/Tag/IndexResponseTest.php
index 4f81efc..58313b2 100644
--- a/tests/Model/Tag/IndexResponseTest.php
+++ b/tests/Model/Tag/IndexResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *
diff --git a/tests/Model/Tag/TagTest.php b/tests/Model/Tag/TagTest.php
index d73b127..c3f73ff 100644
--- a/tests/Model/Tag/TagTest.php
+++ b/tests/Model/Tag/TagTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
  * Copyright (C) 2013 Mailgun
  *