diff --git a/.github/workflows/book.yml b/.github/workflows/book.yml
index 01a687b..6a9565a 100644
--- a/.github/workflows/book.yml
+++ b/.github/workflows/book.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install cargo-binstall
         uses: taiki-e/install-action@v2
         with: