diff --git a/eventing/samples/cronjob-source/README.md b/eventing/samples/cronjob-source/README.md
index 1e5c4a8d6..4d023d6ff 100644
--- a/eventing/samples/cronjob-source/README.md
+++ b/eventing/samples/cronjob-source/README.md
@@ -27,7 +27,7 @@ spec:
       revisionTemplate:
         spec:
           container:
-            image: github.com/knative/eventing-sources/cmd/message_dumper
+            image: gcr.io/knative-releases/github.com/knative/eventing-sources/cmd/message_dumper
 ```
 
 Use following command to create the service from `service.yaml`:
diff --git a/eventing/samples/cronjob-source/service.yaml b/eventing/samples/cronjob-source/service.yaml
index 172a25fad..a61c6cd13 100644
--- a/eventing/samples/cronjob-source/service.yaml
+++ b/eventing/samples/cronjob-source/service.yaml
@@ -10,4 +10,4 @@ spec:
       revisionTemplate:
         spec:
           container:
-            image: github.com/knative/eventing-sources/cmd/message_dumper
+            image: gcr.io/knative-releases/github.com/knative/eventing-sources/cmd/message_dumper