diff --git a/.github/workflows/sub-build-push-image.yml b/.github/workflows/sub-build-push-image.yml
index 4eb9ab74..724078c5 100644
--- a/.github/workflows/sub-build-push-image.yml
+++ b/.github/workflows/sub-build-push-image.yml
@@ -8,6 +8,7 @@ on:
         required: true
       parentImageName:
         description: "Parent image name"
+        required: true
 
 jobs:
   build-push-image: