diff --git a/.github/workflows/backend.yaml b/.github/workflows/backend.yaml
index 43bb79e..811ec97 100644
--- a/.github/workflows/backend.yaml
+++ b/.github/workflows/backend.yaml
@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # https://github.com/docker/login-action#github-container-registry
       - name: Login to GHCR
diff --git a/.github/workflows/codeql.yaml b/.github/workflows/codeql.yaml
index f6f3538..4b4c0f4 100644
--- a/.github/workflows/codeql.yaml
+++ b/.github/workflows/codeql.yaml
@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Initialize CodeQL
         uses: github/codeql-action/init@v4
diff --git a/.github/workflows/create-release.yaml b/.github/workflows/create-release.yaml
index 7111327..d710331 100644
--- a/.github/workflows/create-release.yaml
+++ b/.github/workflows/create-release.yaml
@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Push tag to remote
         id: fetch-latest-tag
diff --git a/.github/workflows/frontend.yaml b/.github/workflows/frontend.yaml
index 7a09597..32bc6d1 100644
--- a/.github/workflows/frontend.yaml
+++ b/.github/workflows/frontend.yaml
@@ -17,7 +17,7 @@ jobs:
       contents: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # https://github.com/actions/setup-node
       - name: Setup node.js environment
diff --git a/.github/workflows/git-pr-release.yaml b/.github/workflows/git-pr-release.yaml
index bd4dc19..fbd52f7 100644
--- a/.github/workflows/git-pr-release.yaml
+++ b/.github/workflows/git-pr-release.yaml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/sync-commit-diffs.yaml b/.github/workflows/sync-commit-diffs.yaml
index a0ffc27..b3832c0 100644
--- a/.github/workflows/sync-commit-diffs.yaml
+++ b/.github/workflows/sync-commit-diffs.yaml
@@ -14,7 +14,7 @@ jobs:
     steps:
       # https://github.com/actions/checkout
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # https://github.com/technote-space/pr-commit-body-action/tree/main
       - name: Pull Request Body
diff --git a/.github/workflows/test-and-build.yaml b/.github/workflows/test-and-build.yaml
index c4145e3..b1ab653 100644
--- a/.github/workflows/test-and-build.yaml
+++ b/.github/workflows/test-and-build.yaml
@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Filter Path
         uses: dorny/paths-filter@v3
@@ -70,7 +70,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup node.js environment
         uses: actions/setup-node@v6
diff --git a/.github/workflows/triage-issues.yaml b/.github/workflows/triage-issues.yaml
index 2c2cd83..86f6393 100644
--- a/.github/workflows/triage-issues.yaml
+++ b/.github/workflows/triage-issues.yaml
@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Assign author to issue
         if: github.event.action == 'opened'
@@ -40,7 +40,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Check Issue Title
         uses: hwakabh/semantic-issue-action@v0.6.1
diff --git a/.github/workflows/triage-pull-requests.yaml b/.github/workflows/triage-pull-requests.yaml
index 63b6e89..99ba031 100644
--- a/.github/workflows/triage-pull-requests.yaml
+++ b/.github/workflows/triage-pull-requests.yaml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       # - name: Assign author to PR
       #   if: github.event.action == 'opened'