diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 6f1938e..79ec122 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -1,6 +1,7 @@
 on:
   pull_request:
   release:
+    types: [published]
 
 jobs:
   doc:
@@ -13,7 +14,7 @@ jobs:
     - run: python -m pip install -e .[doc]
     - run: python doc/build.py
     - uses: peaceiris/actions-gh-pages@v3
-      if: github.ref == 'refs/heads/main'
+      if: ${{ github.ref == 'refs/heads/main' }}
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         publish_dir: doc/_build/html