diff --git a/manifests/base/peer-authentication.yaml b/manifests/base/peer-authentication.yaml
index 4871780..259cb67 100644
--- a/manifests/base/peer-authentication.yaml
+++ b/manifests/base/peer-authentication.yaml
@@ -4,4 +4,4 @@ metadata:
   name: strict-mtls
 spec:
   mtls:
-    mode: PERMISSIVE
+    mode: STRICT