diff --git a/.github/workflows/pull_request_deploy_preview.yml b/.github/workflows/pull_request_deploy_preview.yml
index 82f7cab85e..7b9b952383 100644
--- a/.github/workflows/pull_request_deploy_preview.yml
+++ b/.github/workflows/pull_request_deploy_preview.yml
@@ -30,7 +30,7 @@ jobs:
       - name: build website
         run: echo $BASE_URL && npm run build
         env:
-          BASE_URL: /java-docs/preview-${{ github.ref }}
+          BASE_URL: /java-docs/preview-${{ github.event.number }}
 
       - name: Deploy preview
         uses: rossjrw/pr-preview-action@v1