diff --git a/.github/workflows/deploy_docs.yml b/.github/workflows/deploy_docs.yml
index 1f2f839..6e825e6 100644
--- a/.github/workflows/deploy_docs.yml
+++ b/.github/workflows/deploy_docs.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
       with:
         persist-credentials: true
     - uses: jdx/mise-action@13abe502c30c1559a5c37dff303831bab82c9402 # v2
diff --git a/.github/workflows/fmt.yml b/.github/workflows/fmt.yml
index 7a69e27..0b72294 100644
--- a/.github/workflows/fmt.yml
+++ b/.github/workflows/fmt.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
     - uses: jdx/mise-action@13abe502c30c1559a5c37dff303831bab82c9402 # v2
       with:
         cache: true
diff --git a/.github/workflows/mypy.yml b/.github/workflows/mypy.yml
index 48fe0c6..d815f1c 100644
--- a/.github/workflows/mypy.yml
+++ b/.github/workflows/mypy.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
     - uses: jdx/mise-action@13abe502c30c1559a5c37dff303831bab82c9402 # v2
       with:
         cache: true
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1786b74..d6e9cd0 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,7 +12,7 @@ jobs:
       id-token: write
     steps:
     - name: Checkout code
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
       with:
         persist-credentials: false
     - name: Set up Node.js
diff --git a/.github/workflows/renovate.yml b/.github/workflows/renovate.yml
index 37973a9..b6d95ff 100644
--- a/.github/workflows/renovate.yml
+++ b/.github/workflows/renovate.yml
@@ -15,5 +15,5 @@ jobs:
   validate:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+    - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
     - uses: suzuki-shunsuke/github-action-renovate-config-validator@c22827f47f4f4a5364bdba19e1fe36907ef1318e # v1.1.1
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c4688b8..1b7a54f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
+      uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
     - uses: jdx/mise-action@13abe502c30c1559a5c37dff303831bab82c9402 # v2
       with:
         cache: true