diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index cec20478..b364d91f 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -61,7 +61,7 @@ jobs:
           cp -r "$(readlink ./result)" book
       - name: Deploy to GitHub Pages
         if: github.ref == 'refs/heads/main'
-        uses: crazy-max/ghaction-github-pages@v3
+        uses: crazy-max/ghaction-github-pages@v4
         with:
           target_branch: gh-pages
           build_dir: book