diff --git a/.github/workflows/ci-build.yml b/.github/workflows/ci-build.yml
index 88ddf42..732f224 100644
--- a/.github/workflows/ci-build.yml
+++ b/.github/workflows/ci-build.yml
@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-22.04
 
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     - name: package install
       run: ./ci_prereq.sh
@@ -41,7 +41,7 @@ jobs:
 
     - name: deploy
       if: github.ref == 'refs/heads/master'
-      uses: peaceiris/actions-gh-pages@v3
+      uses: peaceiris/actions-gh-pages@v4
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         publish_branch: gh-pages