diff --git a/.github/workflows/pr-checks.yml b/.github/workflows/pr-checks.yml
index 4423ba0..4f610fc 100644
--- a/.github/workflows/pr-checks.yml
+++ b/.github/workflows/pr-checks.yml
@@ -9,6 +9,10 @@ on:
 permissions:
   contents: read
 
+concurrency:
+  group: pr-checks-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build-and-validate:
     runs-on: xcode-27