diff --git a/.github/workflows/validate-existing-contributors.yaml b/.github/workflows/validate-existing-contributors.yaml
index 76e261ab..dbcd4b42 100644
--- a/.github/workflows/validate-existing-contributors.yaml
+++ b/.github/workflows/validate-existing-contributors.yaml
@@ -1,6 +1,7 @@
 name: Validate Existing Contributors
 
 on:
+  pull_request:
   workflow_call:
 
 env: