diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 39dc08982..d5ccb0be8 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -16,8 +16,8 @@ jobs:
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v2
         with:
-          mdbook-version: 'latest'
-          # mdbook-version: '0.4.8'
+          # mdbook-version: 'latest'
+          mdbook-version: '0.4.43'
 
       - run: mdbook build book