diff --git a/.github/workflows/pr-code-format.yml b/.github/workflows/pr-code-format.yml
index 1a1700b75cfdb..f2bb37316d3a8 100644
--- a/.github/workflows/pr-code-format.yml
+++ b/.github/workflows/pr-code-format.yml
@@ -13,6 +13,9 @@ jobs:
   code_formatter:
     runs-on: ubuntu-latest
     timeout-minutes: 30
+    concurrency:
+      group: ${{ github.workflow }}-${{ github.event.pull_request.number }}
+      cancel-in-progress: true
     if: github.repository == 'llvm/llvm-project'
     steps:
       - name: Fetch LLVM sources