diff --git a/system-apps/guestbook/guestbook-ui-deployment.yaml b/system-apps/guestbook/guestbook-ui-deployment.yaml
index ce9cff4..9e696ae 100644
--- a/system-apps/guestbook/guestbook-ui-deployment.yaml
+++ b/system-apps/guestbook/guestbook-ui-deployment.yaml
@@ -2,6 +2,7 @@ apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: guestbook-ui
+  namespace: guestbook-ui
 spec:
   replicas: 1
   revisionHistoryLimit: 3
diff --git a/system-apps/guestbook/guestbook-ui-svc.yaml b/system-apps/guestbook/guestbook-ui-svc.yaml
index 8807bcf..ac15f15 100644
--- a/system-apps/guestbook/guestbook-ui-svc.yaml
+++ b/system-apps/guestbook/guestbook-ui-svc.yaml
@@ -2,6 +2,7 @@ apiVersion: v1
 kind: Service
 metadata:
   name: guestbook-ui
+  namespace: guestbook-ui
 spec:
   ports:
   - port: 80