diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5709726113..93ec83fd8d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,6 +11,11 @@ on:
     branches:
       - main
 
+# cancel in-progress runs on new commits to same PR (gitub.event.number)
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.number || github.sha }}
+  cancel-in-progress: true
+
 permissions:
   contents: read