diff --git a/.github/workflows/autopr.yml b/.github/workflows/autopr.yml
index f5a8800..f9ae754 100644
--- a/.github/workflows/autopr.yml
+++ b/.github/workflows/autopr.yml
@@ -35,3 +35,4 @@ jobs:
         OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
+        base_branch: master