diff --git a/app/serializers/web/notification_serializer.rb b/app/serializers/web/notification_serializer.rb
index fb2f7248a6..3c50c3b3a0 100644
--- a/app/serializers/web/notification_serializer.rb
+++ b/app/serializers/web/notification_serializer.rb
@@ -17,7 +17,7 @@ class Web::NotificationSerializer < ActiveModel::Serializer
   end
 
   def notification_id
-    object.id
+    object.id.to_s
   end
 
   def notification_type