diff --git a/.github/workflows/github-pages.yml b/.github/workflows/github-pages.yml
index f9e6d9c..d13e524 100644
--- a/.github/workflows/github-pages.yml
+++ b/.github/workflows/github-pages.yml
@@ -20,7 +20,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 623380b..15c4b17 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     
     - name: Generate release tag with JST datetime
       id: generate_tag