diff --git a/src/Snowcap/Emarsys/Client.php b/src/Snowcap/Emarsys/Client.php
index 875be62..95ecb96 100644
--- a/src/Snowcap/Emarsys/Client.php
+++ b/src/Snowcap/Emarsys/Client.php
@@ -893,7 +893,7 @@ public function addBlacklistEntries(array $emails = array(), array $domains = ar
      * @throws ClientException
      * @throws ServerException
      */
-    protected function send($method = 'GET', $uri, array $body = array())
+    protected function send(string $method, $uri, array $body = array())
     {
         $headers = array('Content-Type: application/json', 'X-WSSE: ' . $this->getAuthenticationSignature());
         $uri = $this->baseUrl . $uri;
@@ -911,7 +911,9 @@ protected function send($method = 'GET', $uri, array $body = array())
                 case JSON_ERROR_DEPTH:
                     throw new ClientException('JSON response could not be decoded, maximum depth reached.');
                 default:
-                    throw new ServerException("JSON response could not be decoded:\n" . json_last_error_msg());
+                    $exception = new ServerException("JSON response could not be decoded:\n" . json_last_error_msg());
+                    $exception->setResponseMessage($responseJson);
+                    throw $exception;
             }
         }
 
diff --git a/src/Snowcap/Emarsys/Exception/ServerException.php b/src/Snowcap/Emarsys/Exception/ServerException.php
index f164cf5..205fb62 100644
--- a/src/Snowcap/Emarsys/Exception/ServerException.php
+++ b/src/Snowcap/Emarsys/Exception/ServerException.php
@@ -5,5 +5,27 @@
 
 class ServerException extends \Exception
 {
+    protected $responseMessage = null;
 
-}
\ No newline at end of file
+    /**
+     * Set the response message from the server
+     *
+     * @param string $message
+     * @author David Fox <david@d3r.com>
+     */
+    public function setResponseMessage($message)
+    {
+        $this->responseMessage = $message;
+    }
+
+    /**
+     * Return the response message set on this exception
+     *
+     * @return string
+     * @author David Fox <david@d3r.com>
+     */
+    public function getResponseMessage()
+    {
+        return $this->responseMessage;
+    }
+}