diff --git a/.github/workflows/book-cd.yml b/.github/workflows/book-cd.yml
index 4151008..4338709 100644
--- a/.github/workflows/book-cd.yml
+++ b/.github/workflows/book-cd.yml
@@ -18,7 +18,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Setup mdbook
-        uses: peaceiris/actions-mdbook@v1
+        uses: peaceiris/actions-mdbook@v2
       - run: mdbook build docs
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v3
diff --git a/.github/workflows/book-ci.yml b/.github/workflows/book-ci.yml
index 69d610f..1768d85 100644
--- a/.github/workflows/book-ci.yml
+++ b/.github/workflows/book-ci.yml
@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Setup mdBook
-        uses: peaceiris/actions-mdbook@v1
+        uses: peaceiris/actions-mdbook@v2
       - run: mdbook build docs
 
   doc-test:
@@ -25,7 +25,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Setup mdBook
-        uses: peaceiris/actions-mdbook@v1
+        uses: peaceiris/actions-mdbook@v2
       - run: mdbook test docs
 
   markdown-lint: