diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4326a30..61aae58 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,9 +15,9 @@ on:
   schedule:
     - cron: '0 0 7/15 * *'
 
-# Cancel existing jobs on new pushes to the same branch
+# Cancel previous jobs on new pushes to the same branch
 concurrency:
-  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
 env: