diff --git a/.github/workflows/sphinx.yml b/.github/workflows/sphinx.yml
index 160cc6c..c4ad46a 100644
--- a/.github/workflows/sphinx.yml
+++ b/.github/workflows/sphinx.yml
@@ -6,16 +6,16 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Build HTML
-      uses: ammaraskar/sphinx-action@0.4
+      uses: ammaraskar/sphinx-action@master
     - name: Upload artifacts
-      uses: actions/upload-artifact@v1
+      uses: actions/upload-artifact@v4
       with:
         name: html-docs
         path: docs/_build/html/
     - name: Deploy
-      uses: peaceiris/actions-gh-pages@v3
+      uses: peaceiris/actions-gh-pages@v4
       if: github.ref == 'refs/heads/main'
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}