diff --git a/.github/workflows/mdbook.yml b/.github/workflows/mdbook.yml
index 845cac74..bbf374a2 100644
--- a/.github/workflows/mdbook.yml
+++ b/.github/workflows/mdbook.yml
@@ -33,7 +33,7 @@ jobs:
       MDBOOK_VERSION: 0.4.45
       MDBOOK_ADMONISH_VERSION: 1.19.0 # need to re-run mdbook-admonish install if updating version
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - name: Install mdBook
         run: ./.github/install-mdbook
       - name: Setup Pages