diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index dbfd86e..425276c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,6 +12,6 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v5.0.1
       - name: Check formatting
-        uses: davidanson/markdownlint-cli2-action@v20.0.0
+        uses: davidanson/markdownlint-cli2-action@v21.0.0
         with:
           globs: '**/*.md'