diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9ee7aac..ef6212b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,9 +2,9 @@ name: CI
 
 on: push
 
-#concurrency:
-#  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
-#  cancel-in-progress: true
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name != 'main' && github.ref_name || github.run_id }}
+  cancel-in-progress: true
 
 jobs:
   check: