diff --git a/gitlab-system/gitlab.yaml b/gitlab-system/gitlab.yaml
index 28c5f64..a389b17 100644
--- a/gitlab-system/gitlab.yaml
+++ b/gitlab-system/gitlab.yaml
@@ -144,6 +144,10 @@
               secretName: gitlab-kas-tls
           minReplicas: 1
           maxReplicas: 1
+        mailroom:
+          hpa:
+            minReplicas: 1
+            maxReplicas: 1
         sidekiq:
           #replicas: 1
           minReplicas: 1