diff --git a/src/Bot/Client.php b/src/Bot/Client.php
index 47f0ab4..1006032 100644
--- a/src/Bot/Client.php
+++ b/src/Bot/Client.php
@@ -63,12 +63,12 @@ class Client
     }
 
     /**
-     * @param string $path
-     * @param string $method
-     * @param object $request Request parameters
-     * @param string $responseType
-     * @param string $serializeTo
-     * @param bool   $arrayOfObjects
+     * @param string      $path
+     * @param string      $method
+     * @param object|null $request Request parameters
+     * @param string      $responseType
+     * @param string      $serializeTo
+     * @param bool        $arrayOfObjects
      *
      * @return object|null
      * @throws \Exception
diff --git a/src/Bot/HttpClient.php b/src/Bot/HttpClient.php
index 6eda64a..dea1bc3 100644
--- a/src/Bot/HttpClient.php
+++ b/src/Bot/HttpClient.php
@@ -260,6 +260,11 @@ class HttpClient
         }
     }
 
+    /**
+     * @param array $errors
+     *
+     * @return string
+     */
     private function getErrors(array $errors)
     {
         $errorString = '';
diff --git a/src/Bot/Model/Request/CommandEditRequest.php b/src/Bot/Model/Request/CommandEditRequest.php
index e95161d..cdf6033 100644
--- a/src/Bot/Model/Request/CommandEditRequest.php
+++ b/src/Bot/Model/Request/CommandEditRequest.php
@@ -13,6 +13,7 @@
 
 namespace RetailCrm\Mg\Bot\Model\Request;
 
+use JMS\Serializer\Annotation as Serializer;
 use JMS\Serializer\Annotation\Accessor;
 use JMS\Serializer\Annotation\SkipWhenEmpty;
 use JMS\Serializer\Annotation\Type;
@@ -35,8 +36,7 @@ class CommandEditRequest
      *
      * @Type("int")
      * @Accessor(getter="getBotId",setter="setBotId")
-     *
-     * @Assert\NotBlank
+     * @SkipWhenEmpty()
      */
     private $botId;
 
@@ -45,8 +45,7 @@ class CommandEditRequest
      *
      * @Type("string")
      * @Accessor(getter="getName",setter="setName")
-     *
-     * @Assert\NotBlank
+     * @SkipWhenEmpty()
      */
     private $name;
 
diff --git a/src/Bot/Model/Request/DialogAssignRequest.php b/src/Bot/Model/Request/DialogAssignRequest.php
index f46d7ed..e5aabf6 100644
--- a/src/Bot/Model/Request/DialogAssignRequest.php
+++ b/src/Bot/Model/Request/DialogAssignRequest.php
@@ -13,6 +13,7 @@
 
 namespace RetailCrm\Mg\Bot\Model\Request;
 
+use JMS\Serializer\Annotation as Serializer;
 use JMS\Serializer\Annotation\Accessor;
 use JMS\Serializer\Annotation\SkipWhenEmpty;
 use JMS\Serializer\Annotation\Type;
@@ -34,6 +35,7 @@ class DialogAssignRequest
      *
      * @Type("int")
      * @Accessor(getter="getDialogId", setter="setDialogId")
+     * @SkipWhenEmpty()
      */
     private $dialogId;
 
diff --git a/tests/Bot/Tests/FileTest.php b/tests/Bot/Tests/FileTest.php
index 6529945..430ba1c 100644
--- a/tests/Bot/Tests/FileTest.php
+++ b/tests/Bot/Tests/FileTest.php
@@ -13,8 +13,6 @@
 
 namespace RetailCrm\Mg\Bot\Tests;
 
-use RetailCrm\Mg\Bot\Model\Constants;
-use RetailCrm\Mg\Bot\Model\Request\MessageSendRequest;
 use RetailCrm\Mg\Bot\Model\Response\FullFileResponse;
 use RetailCrm\Mg\Bot\Model\Response\UploadFileResponse;
 use RetailCrm\Mg\Bot\Test\TestCase;