diff --git a/src/Mailer/Transport/SendGridTransport.php b/src/Mailer/Transport/SendGridTransport.php
index 8f10572..1856ad0 100644
--- a/src/Mailer/Transport/SendGridTransport.php
+++ b/src/Mailer/Transport/SendGridTransport.php
@@ -236,7 +236,7 @@ protected function _sendEmail()
         $response = $http
             ->post("{$this->getConfig('apiEndpoint')}/mail/send", json_encode($this->_reqParams), $headers);
 
-        return $response->json;
+        return $response->getJson();
     }
 
     /**