diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index 31cefa0320..0cebf37b57 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -86,7 +86,6 @@ Rails/WhereExists:
     - 'app/models/status.rb'
     - 'app/policies/status_policy.rb'
     - 'app/serializers/rest/announcement_serializer.rb'
-    - 'app/serializers/rest/tag_serializer.rb'
     - 'app/services/activitypub/fetch_remote_status_service.rb'
     - 'app/services/vote_service.rb'
     - 'app/validators/reaction_validator.rb'
diff --git a/app/serializers/rest/tag_serializer.rb b/app/serializers/rest/tag_serializer.rb
index 7801e77d1f..017b572718 100644
--- a/app/serializers/rest/tag_serializer.rb
+++ b/app/serializers/rest/tag_serializer.rb
@@ -19,7 +19,7 @@ class REST::TagSerializer < ActiveModel::Serializer
     if instance_options && instance_options[:relationships]
       instance_options[:relationships].following_map[object.id] || false
     else
-      TagFollow.where(tag_id: object.id, account_id: current_user.account_id).exists?
+      TagFollow.exists?(tag_id: object.id, account_id: current_user.account_id)
     end
   end