diff --git a/.github/workflows/deploy_preview.yml b/.github/workflows/deploy_preview.yml
index 5470c2d2..02ee0f19 100644
--- a/.github/workflows/deploy_preview.yml
+++ b/.github/workflows/deploy_preview.yml
@@ -23,6 +23,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
+        with:
+          ref: ${{ github.event.pull_request.head.sha }}
 
       - name: Extract branch name
         shell: bash