diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 87a6fc2a..a118a1bd 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -7,6 +7,9 @@ on:
       - 'boot/**'
       - 'web/**'
       - '**.md'
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
   unit-test: