diff --git a/Controller/BackendController.php b/Controller/BackendController.php
index 622ba4a..bf523e1 100755
--- a/Controller/BackendController.php
+++ b/Controller/BackendController.php
@@ -49,7 +49,7 @@ final class BackendController extends Controller
      */
     public function setUpBackend(RequestAbstract $request, ResponseAbstract $response, mixed $data = null) : void
     {
-        $head = $response->get('Content')->head;
+        $head = $response->data['Content']->head;
         $head->addAsset(AssetType::CSS, '/Modules/QA/Theme/Backend/styles.css?v=1.0.0');
     }