diff --git a/.github/workflows/bump_patch_version.yml b/.github/workflows/bump_patch_version.yml
index ffc0db16ed6a56baca31edc0a8ad1e984f8fe31f..a56051e695073bf6014f3e123dde7d5bb7e21c97 100644
--- a/.github/workflows/bump_patch_version.yml
+++ b/.github/workflows/bump_patch_version.yml
@@ -9,7 +9,7 @@ on:
 
 concurrency:
   # Allow only one workflow per any non-`main` branch.
-  group: ${{ github.workflow }}-${{ github.event.input.branch }}
+  group: ${{ github.workflow }}-${{ inputs.branch }}
   cancel-in-progress: true
 
 jobs: