diff --git a/.github/workflows/branchcleanup.yml b/.github/workflows/branchcleanup.yml
index 2aa1e96..f3f61ff 100644
--- a/.github/workflows/branchcleanup.yml
+++ b/.github/workflows/branchcleanup.yml
@@ -2,7 +2,7 @@
 name: Branch Cleanup
 # This workflow is triggered on all closed pull requests.
 # However the script does not do anything if a merge was not performed.
-on:
+"on":
   pull_request:
     types: [closed]