diff --git a/config/routes.rb b/config/routes.rb
index 0af147919..40d1546ba 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -31,9 +31,11 @@ Rails.application.routes.draw do
       resources :compose_projects, only: [:create, :destroy]
     end
     resources :attachments do
+      member do 
+        post :preview_attachment
+      end
       collection do
         delete :destroy_files
-        post :preview_attachment
       end
     end
     get 'home/index'