diff --git a/.github/workflows/test-ghpages.yml b/.github/workflows/test-ghpages.yml
index fde5115..8104b95 100644
--- a/.github/workflows/test-ghpages.yml
+++ b/.github/workflows/test-ghpages.yml
@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up Ruby
         uses: ruby/setup-ruby@v1