diff --git a/app/models/notification.rb b/app/models/notification.rb
index a78db0281cf..a54788dd2ed 100644
--- a/app/models/notification.rb
+++ b/app/models/notification.rb
@@ -85,7 +85,7 @@ class Notification < ApplicationRecord
     }.freeze,
     collection_update: {
       filterable: false,
-    },
+    }.freeze,
   }.freeze
 
   TYPES = PROPERTIES.keys.freeze