diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index f4e032de..d27a0066 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -15,7 +15,7 @@ jobs:
     name: Mod
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v4
         with:
           go-version-file: 'go.mod'
@@ -31,7 +31,7 @@ jobs:
     env:
       GOCACHE: "/tmp/go/cache"
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v4
         with:
           go-version-file: 'go.mod'
@@ -66,7 +66,7 @@ jobs:
           MYSQL_ROOT_PASSWORD: password
           MYSQL_DATABASE: anke-to
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v4
         with:
           go-version-file: 'go.mod'
@@ -97,7 +97,7 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - uses: actions/setup-go@v4
         with:
           go-version-file: 'go.mod'
@@ -111,7 +111,7 @@ jobs:
     name: Spectral
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Spectral checks
         uses: stoplightio/spectral-action@v0.8.7
         with:
diff --git a/.github/workflows/master.yml b/.github/workflows/master.yml
index 2ccf57c9..8c3db3b7 100644
--- a/.github/workflows/master.yml
+++ b/.github/workflows/master.yml
@@ -14,7 +14,7 @@ jobs:
     name: Build Docker Image (master)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index f58fb446..aa4fdc6d 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -13,7 +13,7 @@ jobs:
     name: Build Docker Image
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
diff --git a/.github/workflows/review.yml b/.github/workflows/review.yml
index 76aa4f26..1f69f78a 100644
--- a/.github/workflows/review.yml
+++ b/.github/workflows/review.yml
@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       # ------------------------------------------------------------
       # 事前処理：PR目的・関連Issue抽出、レビュー対象ファイルのフィルタリング