diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 619341c..35f9bd7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,7 +31,7 @@ env:
 # https://stackoverflow.com/a/66336834
 concurrency:
   cancel-in-progress: true
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  group: ${{ github.workflow }}-${{ github.ref_name }}
 
 jobs:
   # --------------------------------------------------------------------------