diff --git a/apps/stage-maker/namespace-prefix-policy.yaml b/apps/stage-maker/namespace-prefix-policy.yaml
index 6b6303f..2c79e52 100644
--- a/apps/stage-maker/namespace-prefix-policy.yaml
+++ b/apps/stage-maker/namespace-prefix-policy.yaml
@@ -12,7 +12,7 @@ spec:
       resources:   ["namespaces"]
   matchConditions:
     - name: 'only-stage-editor'
-      value: "request.userInfo.username == 'system:serviceaccount:stage-maker:stage-editor'"
+      expression: "request.userInfo.username == 'system:serviceaccount:stage-maker:stage-editor'"
   validations:
     - expression: "object.metadata.namespace.startsWith('team-')"
       message: "All namespace requests by stage-editor must start with 'team-'"