diff --git a/.github/workflows/book-cd.yml b/.github/workflows/book-cd.yml
index fb3870449..55b2ab144 100644
--- a/.github/workflows/book-cd.yml
+++ b/.github/workflows/book-cd.yml
@@ -11,7 +11,7 @@ jobs:
       contents: write # To push a branch
       pull-requests: write # To create a PR from that branch
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 0
       - name: Install latest mdbook