diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 53d6279..5c3a707 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,9 +9,14 @@ on:
     branches: [main]
   pull_request:
 
+concurrency:
+  group: ci-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' }}
+
 jobs:
   test:
     runs-on: blacksmith-2vcpu-ubuntu-2404
+    timeout-minutes: 15
     steps:
       - name: Checkout cobel
         uses: actions/checkout@v4