diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 9351eeb..d2abecc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -36,7 +36,7 @@ jobs:
     name: Lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ env.DEFAULT_PYTHON }}
@@ -60,7 +60,7 @@ jobs:
       matrix:
         python-version: ["3.10", "3.11", "3.12", "3.13"]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
diff --git a/.github/workflows/claude-code-review.yml b/.github/workflows/claude-code-review.yml
index 4aa07a8..71c3738 100644
--- a/.github/workflows/claude-code-review.yml
+++ b/.github/workflows/claude-code-review.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/claude.yml b/.github/workflows/claude.yml
index cd00346..da2c7c4 100644
--- a/.github/workflows/claude.yml
+++ b/.github/workflows/claude.yml
@@ -26,7 +26,7 @@ jobs:
       actions: read
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           fetch-depth: 1
 
diff --git a/.github/workflows/dev-publish.yml b/.github/workflows/dev-publish.yml
index 31b856b..8ab8a04 100644
--- a/.github/workflows/dev-publish.yml
+++ b/.github/workflows/dev-publish.yml
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: guard
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v6
         with:
diff --git a/.github/workflows/dev-release-pr.yml b/.github/workflows/dev-release-pr.yml
index 00dbf52..5b855a5 100644
--- a/.github/workflows/dev-release-pr.yml
+++ b/.github/workflows/dev-release-pr.yml
@@ -13,7 +13,7 @@ jobs:
     if: "!contains(github.event.head_commit.message, 'chore: bump version')"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           ref: dev
           token: ${{ secrets.GITHUB_TOKEN }}
diff --git a/.github/workflows/python-publish.yml b/.github/workflows/python-publish.yml
index d44f757..9775465 100644
--- a/.github/workflows/python-publish.yml
+++ b/.github/workflows/python-publish.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-python@v6
         with:
diff --git a/.github/workflows/release-on-master.yml b/.github/workflows/release-on-master.yml
index cac49e2..f30d6d2 100644
--- a/.github/workflows/release-on-master.yml
+++ b/.github/workflows/release-on-master.yml
@@ -11,7 +11,7 @@ jobs:
   tag-and-release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0