diff --git a/.github/workflows/base.yml b/.github/workflows/base.yml
index 61ce2d0..ddb26a2 100644
--- a/.github/workflows/base.yml
+++ b/.github/workflows/base.yml
@@ -13,7 +13,9 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
 
       - name: set up JDK 17
         uses: actions/setup-java@v3