diff --git a/src/Mailgun/Api/HttpApi.php b/src/Mailgun/Api/HttpApi.php
index fe45102..0097d3a 100644
--- a/src/Mailgun/Api/HttpApi.php
+++ b/src/Mailgun/Api/HttpApi.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Api;
 
 use Http\Client\Exception as HttplugException;
diff --git a/src/Mailgun/Api/Stats.php b/src/Mailgun/Api/Stats.php
index 7c14dae..4213ae0 100644
--- a/src/Mailgun/Api/Stats.php
+++ b/src/Mailgun/Api/Stats.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Api;
 
 use Mailgun\Assert;
diff --git a/src/Mailgun/Deserializer/ArrayDeserializer.php b/src/Mailgun/Deserializer/ArrayDeserializer.php
index 0f2889c..c76fd3e 100644
--- a/src/Mailgun/Deserializer/ArrayDeserializer.php
+++ b/src/Mailgun/Deserializer/ArrayDeserializer.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Deserializer;
 
 use Mailgun\Exception\DeserializeException;
diff --git a/src/Mailgun/Deserializer/ModelDeserializer.php b/src/Mailgun/Deserializer/ModelDeserializer.php
index 3f3372d..a1c5ee8 100644
--- a/src/Mailgun/Deserializer/ModelDeserializer.php
+++ b/src/Mailgun/Deserializer/ModelDeserializer.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Deserializer;
 
 use Mailgun\Exception\DeserializeException;
diff --git a/src/Mailgun/Deserializer/PSR7Deserializer.php b/src/Mailgun/Deserializer/PSR7Deserializer.php
index a8b549d..0b0361e 100644
--- a/src/Mailgun/Deserializer/PSR7Deserializer.php
+++ b/src/Mailgun/Deserializer/PSR7Deserializer.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Deserializer;
 
 use Psr\Http\Message\ResponseInterface;
diff --git a/src/Mailgun/Deserializer/ResponseDeserializer.php b/src/Mailgun/Deserializer/ResponseDeserializer.php
index f124b69..efb2ae4 100644
--- a/src/Mailgun/Deserializer/ResponseDeserializer.php
+++ b/src/Mailgun/Deserializer/ResponseDeserializer.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Deserializer;
 
 use Psr\Http\Message\ResponseInterface;
diff --git a/src/Mailgun/Exception.php b/src/Mailgun/Exception.php
index ea6fdf3..84e67c7 100644
--- a/src/Mailgun/Exception.php
+++ b/src/Mailgun/Exception.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun;
 
 /**
diff --git a/src/Mailgun/Exception/DeserializeException.php b/src/Mailgun/Exception/DeserializeException.php
index dfc2084..350bc8a 100644
--- a/src/Mailgun/Exception/DeserializeException.php
+++ b/src/Mailgun/Exception/DeserializeException.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Exception;
 
 use Mailgun\Exception;
diff --git a/src/Mailgun/Exception/HttpClientException.php b/src/Mailgun/Exception/HttpClientException.php
index df07a34..5aa92fc 100644
--- a/src/Mailgun/Exception/HttpClientException.php
+++ b/src/Mailgun/Exception/HttpClientException.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Exception;
 
 use Mailgun\Exception;
diff --git a/src/Mailgun/Exception/HttpServerException.php b/src/Mailgun/Exception/HttpServerException.php
index 1c123f3..5ca6a87 100644
--- a/src/Mailgun/Exception/HttpServerException.php
+++ b/src/Mailgun/Exception/HttpServerException.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Exception;
 
 use Mailgun\Exception;
diff --git a/src/Mailgun/Exception/InvalidArgumentException.php b/src/Mailgun/Exception/InvalidArgumentException.php
index 8fbcee6..18eb519 100644
--- a/src/Mailgun/Exception/InvalidArgumentException.php
+++ b/src/Mailgun/Exception/InvalidArgumentException.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Exception;
 
 use Mailgun\Exception;
diff --git a/src/Mailgun/HttpClientConfigurator.php b/src/Mailgun/HttpClientConfigurator.php
index 3839b11..d13f350 100644
--- a/src/Mailgun/HttpClientConfigurator.php
+++ b/src/Mailgun/HttpClientConfigurator.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun;
 
 use Http\Client\HttpClient;
diff --git a/src/Mailgun/RequestBuilder.php b/src/Mailgun/RequestBuilder.php
index 23bdbc7..0c8c3fc 100644
--- a/src/Mailgun/RequestBuilder.php
+++ b/src/Mailgun/RequestBuilder.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun;
 
 use Http\Discovery\MessageFactoryDiscovery;
diff --git a/src/Mailgun/Resource/Api/Domain/ConnectionResponse.php b/src/Mailgun/Resource/Api/Domain/ConnectionResponse.php
index ad0257c..045ae9e 100644
--- a/src/Mailgun/Resource/Api/Domain/ConnectionResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/ConnectionResponse.php
@@ -1,11 +1,12 @@
 <?php
 
-/**
- * Copyright (C) 2013-2016 Mailgun.
+/*
+ * Copyright (C) 2013-2016 Mailgun
  *
  * This software may be modified and distributed under the terms
  * of the MIT license.  See the LICENSE file for details.
  */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
diff --git a/src/Mailgun/Resource/Api/Domain/CreateCredentialResponse.php b/src/Mailgun/Resource/Api/Domain/CreateCredentialResponse.php
index 1568243..9b5f590 100644
--- a/src/Mailgun/Resource/Api/Domain/CreateCredentialResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/CreateCredentialResponse.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Resource\ApiResponse;
diff --git a/src/Mailgun/Resource/Api/Domain/CreateResponse.php b/src/Mailgun/Resource/Api/Domain/CreateResponse.php
index 9eb3d20..650c644 100644
--- a/src/Mailgun/Resource/Api/Domain/CreateResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/CreateResponse.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
diff --git a/src/Mailgun/Resource/Api/Domain/CredentialResponseItem.php b/src/Mailgun/Resource/Api/Domain/CredentialResponseItem.php
index 1cd0ada..bd358c2 100644
--- a/src/Mailgun/Resource/Api/Domain/CredentialResponseItem.php
+++ b/src/Mailgun/Resource/Api/Domain/CredentialResponseItem.php
@@ -1,11 +1,12 @@
 <?php
 
-/**
- * Copyright (C) 2013-2016 Mailgun.
+/*
+ * Copyright (C) 2013-2016 Mailgun
  *
  * This software may be modified and distributed under the terms
  * of the MIT license.  See the LICENSE file for details.
  */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
diff --git a/src/Mailgun/Resource/Api/Domain/DeleteCredentialResponse.php b/src/Mailgun/Resource/Api/Domain/DeleteCredentialResponse.php
index 70cab26..730dabf 100644
--- a/src/Mailgun/Resource/Api/Domain/DeleteCredentialResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/DeleteCredentialResponse.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Resource\ApiResponse;
diff --git a/src/Mailgun/Resource/Api/Domain/DeleteResponse.php b/src/Mailgun/Resource/Api/Domain/DeleteResponse.php
index af0b4a4..e7400d2 100644
--- a/src/Mailgun/Resource/Api/Domain/DeleteResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/DeleteResponse.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Resource\ApiResponse;
diff --git a/src/Mailgun/Resource/Api/Domain/DnsRecord.php b/src/Mailgun/Resource/Api/Domain/DnsRecord.php
index 9d47ded..f513ab9 100644
--- a/src/Mailgun/Resource/Api/Domain/DnsRecord.php
+++ b/src/Mailgun/Resource/Api/Domain/DnsRecord.php
@@ -1,11 +1,12 @@
 <?php
 
-/**
- * Copyright (C) 2013-2016 Mailgun.
+/*
+ * Copyright (C) 2013-2016 Mailgun
  *
  * This software may be modified and distributed under the terms
  * of the MIT license.  See the LICENSE file for details.
  */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
diff --git a/src/Mailgun/Resource/Api/Domain/Domain.php b/src/Mailgun/Resource/Api/Domain/Domain.php
index fa8580f..53b6079 100644
--- a/src/Mailgun/Resource/Api/Domain/Domain.php
+++ b/src/Mailgun/Resource/Api/Domain/Domain.php
@@ -1,11 +1,12 @@
 <?php
 
-/**
- * Copyright (C) 2013-2016 Mailgun.
+/*
+ * Copyright (C) 2013-2016 Mailgun
  *
  * This software may be modified and distributed under the terms
  * of the MIT license.  See the LICENSE file for details.
  */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
diff --git a/src/Mailgun/Resource/Api/Domain/ShowResponse.php b/src/Mailgun/Resource/Api/Domain/ShowResponse.php
index 7c1d9fd..da32f3a 100644
--- a/src/Mailgun/Resource/Api/Domain/ShowResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/ShowResponse.php
@@ -1,11 +1,12 @@
 <?php
 
-/**
- * Copyright (C) 2013-2016 Mailgun.
+/*
+ * Copyright (C) 2013-2016 Mailgun
  *
  * This software may be modified and distributed under the terms
  * of the MIT license.  See the LICENSE file for details.
  */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
diff --git a/src/Mailgun/Resource/Api/Domain/UpdateConnectionResponse.php b/src/Mailgun/Resource/Api/Domain/UpdateConnectionResponse.php
index 4b62598..3354ce1 100644
--- a/src/Mailgun/Resource/Api/Domain/UpdateConnectionResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/UpdateConnectionResponse.php
@@ -1,11 +1,12 @@
 <?php
 
-/**
- * Copyright (C) 2013-2016 Mailgun.
+/*
+ * Copyright (C) 2013-2016 Mailgun
  *
  * This software may be modified and distributed under the terms
  * of the MIT license.  See the LICENSE file for details.
  */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Assert;
diff --git a/src/Mailgun/Resource/Api/Domain/UpdateCredentialResponse.php b/src/Mailgun/Resource/Api/Domain/UpdateCredentialResponse.php
index ffbb912..9f7bf05 100644
--- a/src/Mailgun/Resource/Api/Domain/UpdateCredentialResponse.php
+++ b/src/Mailgun/Resource/Api/Domain/UpdateCredentialResponse.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Resource\Api\Domain;
 
 use Mailgun\Resource\ApiResponse;
diff --git a/src/Mailgun/Resource/Api/ErrorResponse.php b/src/Mailgun/Resource/Api/ErrorResponse.php
index 67a18bd..f093e84 100644
--- a/src/Mailgun/Resource/Api/ErrorResponse.php
+++ b/src/Mailgun/Resource/Api/ErrorResponse.php
@@ -1,11 +1,12 @@
 <?php
 
-/**
- * Copyright (C) 2013-2016 Mailgun.
+/*
+ * Copyright (C) 2013-2016 Mailgun
  *
  * This software may be modified and distributed under the terms
  * of the MIT license.  See the LICENSE file for details.
  */
+
 namespace Mailgun\Resource\Api;
 
 use Mailgun\Resource\ApiResponse;
diff --git a/src/Mailgun/Resource/Api/Stats/AllResponse.php b/src/Mailgun/Resource/Api/Stats/AllResponse.php
index 3818fe8..29835d4 100644
--- a/src/Mailgun/Resource/Api/Stats/AllResponse.php
+++ b/src/Mailgun/Resource/Api/Stats/AllResponse.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Resource\Api\Stats;
 
 use Mailgun\Resource\ApiResponse;
diff --git a/src/Mailgun/Resource/Api/Stats/AllResponseItem.php b/src/Mailgun/Resource/Api/Stats/AllResponseItem.php
index aa595ef..ab52a05 100644
--- a/src/Mailgun/Resource/Api/Stats/AllResponseItem.php
+++ b/src/Mailgun/Resource/Api/Stats/AllResponseItem.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Resource\Api\Stats;
 
 use Mailgun\Assert;
diff --git a/src/Mailgun/Resource/Api/Stats/TotalResponse.php b/src/Mailgun/Resource/Api/Stats/TotalResponse.php
index bc98307..4b818a9 100644
--- a/src/Mailgun/Resource/Api/Stats/TotalResponse.php
+++ b/src/Mailgun/Resource/Api/Stats/TotalResponse.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Resource\Api\Stats;
 
 use Mailgun\Resource\ApiResponse;
diff --git a/src/Mailgun/Resource/Api/Stats/TotalResponseItem.php b/src/Mailgun/Resource/Api/Stats/TotalResponseItem.php
index 83733dd..4f0af57 100644
--- a/src/Mailgun/Resource/Api/Stats/TotalResponseItem.php
+++ b/src/Mailgun/Resource/Api/Stats/TotalResponseItem.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Resource\Api\Stats;
 
 use Mailgun\Assert;
diff --git a/src/Mailgun/Resource/ApiResponse.php b/src/Mailgun/Resource/ApiResponse.php
index b468505..9717657 100644
--- a/src/Mailgun/Resource/ApiResponse.php
+++ b/src/Mailgun/Resource/ApiResponse.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Resource;
 
 /**
diff --git a/tests/Api/StatsTest.php b/tests/Api/StatsTest.php
index ef8718a..0d8abfd 100644
--- a/tests/Api/StatsTest.php
+++ b/tests/Api/StatsTest.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Tests\Api;
 
 use GuzzleHttp\Psr7\Response;
diff --git a/tests/Api/TestCase.php b/tests/Api/TestCase.php
index 5d2399a..47ee0fa 100644
--- a/tests/Api/TestCase.php
+++ b/tests/Api/TestCase.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Tests\Api;
 
 /**
diff --git a/tests/Functional/FileFromMemoryTest.php b/tests/Functional/FileFromMemoryTest.php
index 443aef9..3c755f7 100644
--- a/tests/Functional/FileFromMemoryTest.php
+++ b/tests/Functional/FileFromMemoryTest.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Tests\Functional;
 
 /**
diff --git a/tests/RequestBuilderTest.php b/tests/RequestBuilderTest.php
index e91fdc8..661e729 100644
--- a/tests/RequestBuilderTest.php
+++ b/tests/RequestBuilderTest.php
@@ -1,5 +1,12 @@
 <?php
 
+/*
+ * Copyright (C) 2013-2016 Mailgun
+ *
+ * This software may be modified and distributed under the terms
+ * of the MIT license.  See the LICENSE file for details.
+ */
+
 namespace Mailgun\Tests;
 
 use Mailgun\RequestBuilder;