diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 3ee1165..9e8503d 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -8,13 +8,13 @@ on:
 
 jobs:
   deploy:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
     concurrency:
       group: ${{ github.workflow }}-${{ github.ref }}
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v5
 
       - name: Setup mdBook
         uses: peaceiris/actions-mdbook@v1