diff --git a/.github/workflows/docs.yaml b/.github/workflows/docs.yaml
index 575412d96..0b3305833 100644
--- a/.github/workflows/docs.yaml
+++ b/.github/workflows/docs.yaml
@@ -58,7 +58,7 @@ jobs:
           
       # Deploy to the target directory.
       - name: Deploy to gh pages
-        uses: peaceiris/actions-gh-pages@de7ea6f8efb354206b205ef54722213d99067935 # v3.9.0
+        uses: peaceiris/actions-gh-pages@64b46b4226a4a12da2239ba3ea5aa73e3163c75b # v3.9.1
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./book
diff --git a/changelog.d/14791.misc b/changelog.d/14791.misc
new file mode 100644
index 000000000..6474859f3
--- /dev/null
+++ b/changelog.d/14791.misc
@@ -0,0 +1 @@
+Bump peaceiris/actions-gh-pages from 3.9.0 to 3.9.1.