diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f27e5fb5..eaa982c8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,10 @@ on:
   pull_request:
     branches: [main]
 
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   test:
     name: Test Python ${{ matrix.python-version }}