diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 97bfd26..64ddb86 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -20,7 +20,7 @@ jobs:
       contents: read # リポジトリコンテンツの読み取り
       id-token: write # niks3 OIDC認証
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           persist-credentials: false
       - uses: ncaq/nix-composite-action@5a61f70ad5b7d2f276732e14355b7fb2ddd4caaf # v1.3.0
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index 3c9ae76..add1d6b 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -19,7 +19,7 @@ jobs:
       id-token: write # niks3のOIDC認証に必要
       deployments: write # Cloudflareデプロイメントステータスの更新
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           persist-credentials: false
       - uses: ncaq/nix-composite-action@5a61f70ad5b7d2f276732e14355b7fb2ddd4caaf # v1.3.0