diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0b7cfd0..d580eec 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -3,6 +3,9 @@ on:
   workflow_dispatch:
   push:
     branches: [main]
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 jobs:
   parse-flake:
     runs-on: ubuntu-latest