diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 5f092b13a..281536aa1 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -45,7 +45,7 @@ jobs:
           echo $docpath
           echo "DOCPATH=$docpath" >> $GITHUB_OUTPUT
       - name: Deploy haddock documentation
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: ${{ github.event_name == 'push' && github.ref == 'refs/heads/master' }}
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}