diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index f787d35..f13b1c1 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -14,7 +14,7 @@ jobs:
       - run: mdbook build
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3
-        if: ${{ github.ref == 'refs/heads/main' }}
+        if: ${{ github.ref == 'refs/heads/master' }}
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./book