diff --git a/chapter-04/exercise4.10/guestbook.yaml b/chapter-04/exercise4.10/guestbook.yaml
index 508e478..27af9e7 100644
--- a/chapter-04/exercise4.10/guestbook.yaml
+++ b/chapter-04/exercise4.10/guestbook.yaml
@@ -13,5 +13,5 @@ spec:
     spec:
       containers:
       - name: guestbook
-        image: acme.com/guestbook:yyyyyy
+        image: acme.com/guestbook:zzzzzz