diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index 8d81111..c1ac13b 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -27,7 +27,7 @@ jobs:
       - name: Setup Pages
         uses: actions/configure-pages@v2
       - name: Install mdbook
-        uses: peaceiris/actions-mdbook@v1.1.14
+        uses: peaceiris/actions-mdbook@v2.0.0
         with:
           mdbook-version: "0.4.7"
       - name: Generate book from markdown