diff --git a/config/routes.rb b/config/routes.rb
index f39a608..007eab7 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -31,7 +31,7 @@
 
   get 'admin/posts/:state',
     to: 'crowdblog/admin/posts#index',
-    filter: /finished|reviewed/,
+    constraints: { state: /finished|reviewed/ },
     as: :admin_posts_by_state
 
   mount Crowdblog::Engine => '/'