diff --git a/core/lib/Drupal/Core/Ajax/AjaxResponse.php b/core/lib/Drupal/Core/Ajax/AjaxResponse.php
index a28017d..97eca0a 100644
--- a/core/lib/Drupal/Core/Ajax/AjaxResponse.php
+++ b/core/lib/Drupal/Core/Ajax/AjaxResponse.php
@@ -7,9 +7,9 @@
 
 namespace Drupal\Core\Ajax;
 
-use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Asset\AttachedAssets;
 use Drupal\Core\Render\Renderer;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\JsonResponse;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
@@ -39,6 +39,37 @@ class AjaxResponse extends JsonResponse {
   ];
 
   /**
+   * The renderer service.
+   *
+   * @var \Drupal\Core\Render\Renderer
+   */
+  protected $renderer;
+
+  /**
+   * Constructs a new AjaxResponse object.
+   *
+   * @param \Drupal\Core\Render\Renderer $renderer
+   *   The renderer service.
+   * @param mixed $data
+   *   The response data.
+   * @param int $status
+   *   The response status code.
+   * @param array $headers
+   *   An array of response headers.
+   */
+  public function __construct(Renderer $renderer, $data = NULL, $status = 200, $headers = array()) {
+    parent::__construct($data, $status, $headers);
+    $this->renderer = $renderer;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container, $data = NULL, $status = 200, $headers = array()) {
+    return new static($container->get('renderer'), $data, $status, $headers);
+  }
+
+  /**
    * Sets attachments for this Ajax response.
    *
    * When this Ajax response is rendered, it will take care of generating the
@@ -79,7 +110,7 @@ public function addCommand(CommandInterface $command, $prepend = FALSE) {
         'library' => $assets->getLibraries(),
         'drupalSettings' => $assets->getSettings(),
       ];
-      $attachments = NestedArray::mergeDeep($this->attachments, $attachments);
+      $attachments = $this->renderer->mergeAttachments($this->attachments, $attachments);
       $this->setAttachments($attachments);
     }