diff --git a/.github/workflows/hardReleaseParent.yml b/.github/workflows/hardReleaseParent.yml
index 3d8ea899..50d5f495 100644
--- a/.github/workflows/hardReleaseParent.yml
+++ b/.github/workflows/hardReleaseParent.yml
@@ -1,7 +1,10 @@
 name: Trigger Child Workflows
 
 on:
-  workflow_dispatch:
+  # Scan changed files in PRs, block on new issues only (existing issues ignored)
+  pull_request:
+    branches:    
+      - master
     inputs:
       environment:
         description: Choose build environment