diff --git a/.github/workflows/checker.yml b/.github/workflows/checker.yml
index 83ecaea..7757b45 100644
--- a/.github/workflows/checker.yml
+++ b/.github/workflows/checker.yml
@@ -9,9 +9,9 @@ on:
     types:
       - completed
 
-#concurrency:
-#  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
-#  cancel-in-progress: true
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+  cancel-in-progress: true
 
 jobs: