diff --git a/apps/stage-maker/namespace-prefix-policy.yaml b/apps/stage-maker/namespace-prefix-policy.yaml
index 2c79e52..ceabf97 100644
--- a/apps/stage-maker/namespace-prefix-policy.yaml
+++ b/apps/stage-maker/namespace-prefix-policy.yaml
@@ -23,6 +23,7 @@ metadata:
   name: "force-ns-prefix-for-stage-editor-binding"
 spec:
   policyName: "force-ns-prefix-for-stage-editor"
+  validationActions: [Deny]
   matchResources:
     resourceRules:
     - apiGroups:   [""]