diff --git a/manifests/mailu/values.yaml b/manifests/mailu/values.yaml
index da69a54..4b85f1c 100644
--- a/manifests/mailu/values.yaml
+++ b/manifests/mailu/values.yaml
@@ -61,3 +61,6 @@ front:
 
 dkim:
   enabled: true
+
+nodeSelector:
+  kubernetes.io/hostname: k3s-master-1