diff --git a/.github/workflows/mkdocs.yml b/.github/workflows/mkdocs.yml
index 14beaed..be4aa88 100644
--- a/.github/workflows/mkdocs.yml
+++ b/.github/workflows/mkdocs.yml
@@ -35,7 +35,7 @@ jobs:
       - name: Prepare system
         run: pip install --user mkdocs mkdocs-material pymdown-extensions pygments markdown-blockdiag mkdocs-bibtex markdown-aafigure mkdocs-build-plantuml-plugin 'Pillow' 'Markdown'
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
       - name: Setup Pages
         id: pages
         uses: actions/configure-pages@v5