diff --git a/Adapter/PlentymarketsAdapter/Client/Client.php b/Adapter/PlentymarketsAdapter/Client/Client.php
index fddd37204..593f9fef9 100644
--- a/Adapter/PlentymarketsAdapter/Client/Client.php
+++ b/Adapter/PlentymarketsAdapter/Client/Client.php
@@ -5,7 +5,6 @@
 use Assert\Assertion;
 use Closure;
 use Exception;
-use GuzzleHttp\Client as GuzzleClient;
 use GuzzleHttp\ClientInterface as GuzzleClientInterface;
 use GuzzleHttp\Exception\ClientException;
 use GuzzleHttp\Exception\ServerException;
@@ -44,11 +43,11 @@ class Client implements ClientInterface
     /**
      * Client constructor.
      *
-     * @param GuzzleClient           $connection
+     * @param GuzzleClientInterface $connection
      * @param ConfigServiceInterface $config
      */
     public function __construct(
-        GuzzleClient $connection,
+        GuzzleClientInterface $connection,
         ConfigServiceInterface $config
     ) {
         $this->connection = $connection;
@@ -115,6 +114,10 @@ public function request($method, $path, array $params = [], $limit = null, $offs
         try {
             $response = $this->connection->send($request);
 
+            if (null === $response) {
+                throw InvalidResponseException::fromParams($method, $path, $options);
+            }
+
             $body = $response->getBody();
 
             if (null === $body) {