diff --git a/app/controllers/admins/topic/banners_controller.rb b/app/controllers/admins/topic/banners_controller.rb
index 8d48892bc..c0350e355 100644
--- a/app/controllers/admins/topic/banners_controller.rb
+++ b/app/controllers/admins/topic/banners_controller.rb
@@ -53,6 +53,6 @@ class Admins::Topic::BannersController < Admins::Topic::BaseController
   end
 
   def banner_params 
-    params.require(:topic_banner).permit(:title, :order_index)
+    params.require(:topic_banner).permit(:title, :order_index, :url)
   end
 end
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