diff --git a/tutorials/basic/task-hello-world/task_ubuntu_uname.yml b/tutorials/basic/task-hello-world/task_ubuntu_uname.yml
index 7757155f..12d3ae78 100644
--- a/tutorials/basic/task-hello-world/task_ubuntu_uname.yml
+++ b/tutorials/basic/task-hello-world/task_ubuntu_uname.yml
@@ -3,7 +3,7 @@ platform: linux
 
 image_resource:
   type: docker-image
-  source: {repository: ubuntu}
+  source: {repository: ubuntu/<tag>}
 
 run:
   path: uname