diff --git a/camel/Extraction/Response.php b/camel/Extraction/Response.php
index 2c574386..ca4e870b 100644
--- a/camel/Extraction/Response.php
+++ b/camel/Extraction/Response.php
@@ -17,7 +17,7 @@ class Response extends BaseDTO
 
     public function __construct(array $parameters = [])
     {
-        if (is_array($parameters['content'])) {
+        if (is_array($parameters['content'] ?? null)) {
             $parameters['content'] = json_encode($parameters['content']);
         }