diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 24e2d8e..0191750 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,6 +4,9 @@ on:
     branches:
       - master
   pull_request:
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 jobs:
   stack-test:
     name: stack test