diff --git a/charts/maddy/templates/install.yaml b/charts/maddy/templates/install.yaml
index 6605094..e84ef16 100644
--- a/charts/maddy/templates/install.yaml
+++ b/charts/maddy/templates/install.yaml
@@ -68,7 +68,7 @@
   name: mail.{{ .Values.ingress.public.domain }}
   namespace: {{ .Release.Namespace }}
   annotations:
-    "helm.sh/resource-policy": keep
+    helm.sh/resource-policy: keep
 spec:
   dnsNames:
   - 'mail.{{ .Values.ingress.public.domain }}'