diff --git a/.github/workflows/sphinx.yaml b/.github/workflows/sphinx.yaml
index 85338f5cc0079c3a46f4114b865124bd818f3bb5..60011acbdcc931518cf6422f003f3ac562540ef3 100644
--- a/.github/workflows/sphinx.yaml
+++ b/.github/workflows/sphinx.yaml
@@ -24,6 +24,7 @@ jobs:
         run: TZ=UTC sphinx-build -b html docs/source docs/build
       - uses: peaceiris/actions-gh-pages@v3
         with:
+          publish_branch: gh-pages
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: docs/build/
           enable_jekyll: false