diff --git a/config/sidekiq_queues.yml b/config/sidekiq_queues.yml
index c2e880e891f1eca5593e7b97fee1e2343b94a06d..f36fe893fd0cf9c9bb508d6f016d7d5c768b5996 100644
--- a/config/sidekiq_queues.yml
+++ b/config/sidekiq_queues.yml
@@ -27,6 +27,7 @@
   - [gitlab_shell, 2]
   - [email_receiver, 2]
   - [emails_on_push, 2]
+  - [mailers, 2]
   - [repository_fork, 1]
   - [repository_import, 1]
   - [project_service, 1]