diff --git a/src/Resources/public/js/wishlist-action-handler.js b/src/Resources/public/js/wishlist-action-handler.js
index df16815..4974a3e 100644
--- a/src/Resources/public/js/wishlist-action-handler.js
+++ b/src/Resources/public/js/wishlist-action-handler.js
@@ -64,3 +64,5 @@ class WishlistActionHandler {
         });
     }
 }
+
+new WishlistActionHandler(window.ssWishlist || {});
diff --git a/src/Resources/views/shop/_javascripts.html.twig b/src/Resources/views/shop/_javascripts.html.twig
index 6ff7b03..172a947 100644
--- a/src/Resources/views/shop/_javascripts.html.twig
+++ b/src/Resources/views/shop/_javascripts.html.twig
@@ -1,4 +1 @@
-<script src="{{ asset('bundles/setonosyliuswishlistplugin/js/wishlist-action-handler.js') }}"></script>
-<script>
-    const wishlistActionHandler = new WishlistActionHandler();
-</script>
+<script src="{{ asset('bundles/setonosyliuswishlistplugin/js/wishlist-action-handler.js') }}" defer></script>