diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d5ffc5e..0220b9e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,10 @@ on:
   pull_request:
     branches: [main]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   typecheck:
     name: TypeScript typecheck (src/)