diff --git a/engine/settings/prod_without_db.py b/engine/settings/prod_without_db.py
index 0c583483..879bf3e9 100644
--- a/engine/settings/prod_without_db.py
+++ b/engine/settings/prod_without_db.py
@@ -101,6 +101,7 @@ CELERY_TASK_ROUTES = {
     "apps.alerts.tasks.unsilence.unsilence_task": {"queue": "critical"},
     "apps.base.tasks.process_failed_to_invoke_celery_tasks": {"queue": "critical"},
     "apps.base.tasks.process_failed_to_invoke_celery_tasks_batch": {"queue": "critical"},
+    "apps.email.tasks.notify_user_async": {"queue": "critical"},
     "apps.integrations.tasks.create_alert": {"queue": "critical"},
     "apps.integrations.tasks.create_alertmanager_alerts": {"queue": "critical"},
     "apps.integrations.tasks.start_notify_about_integration_ratelimit": {"queue": "critical"},