diff --git a/.github/workflows/markdown.yml b/.github/workflows/markdown.yml
index f00ba5b..14cc631 100644
--- a/.github/workflows/markdown.yml
+++ b/.github/workflows/markdown.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: markdownlint-cli2-action
         uses: DavidAnson/markdownlint-cli2-action@v20