diff --git a/.github/workflows/signed-commit-authors.yml b/.github/workflows/signed-commit-authors.yml
index 3e48029..7a8c6e2 100644
--- a/.github/workflows/signed-commit-authors.yml
+++ b/.github/workflows/signed-commit-authors.yml
@@ -9,8 +9,9 @@
 name: Signed Commit Authors
 
 on:
-  pull_request: {}
-  merge_group: {}
+  pull_request:
+    branches: ['**']
+  merge_group:
 
 permissions: {}