diff --git a/extensions/flags/bootstrap.php b/extensions/flags/bootstrap.php
index 6f5afd6c6..11009b95d 100644
--- a/extensions/flags/bootstrap.php
+++ b/extensions/flags/bootstrap.php
@@ -17,11 +17,11 @@ use Flarum\Flags\Listener;
 use Illuminate\Contracts\Events\Dispatcher;
 
 return [
-    (new Extend\Assets('forum'))
+    (new Extend\Frontend('forum'))
         ->js(__DIR__.'/js/dist/forum.js')
-        ->asset(__DIR__.'/less/forum.less'),
+        ->css(__DIR__.'/less/forum.less'),
 
-    (new Extend\Assets('admin'))
+    (new Extend\Frontend('admin'))
         ->js(__DIR__.'/js/dist/admin.js'),
 
     (new Extend\Routes('api'))