diff --git a/.github/workflows/auto-testing.yml b/.github/workflows/auto-testing.yml
index 3874ba5d5..402617ed0 100644
--- a/.github/workflows/auto-testing.yml
+++ b/.github/workflows/auto-testing.yml
@@ -24,7 +24,7 @@ jobs:
           - '3.13'
           - '3.14'
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       with:
         submodules: true
     - name: Set up Python ${{ matrix.python-version }}
@@ -60,7 +60,7 @@ jobs:
           - '3.13'
           - '3.14'
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           submodules: true
       - name: Set up Python ${{ matrix.python-version }}
@@ -79,7 +79,7 @@ jobs:
     permissions:
       contents: read
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Run pinact
         uses: suzuki-shunsuke/pinact-action@49cbd6acd0dbab6a6be2585d1dbdaa43b4410133 # v1.0.0
         with:
diff --git a/.github/workflows/check-eol-newrelease.yml b/.github/workflows/check-eol-newrelease.yml
index e00b16b38..8a8e8e672 100644
--- a/.github/workflows/check-eol-newrelease.yml
+++ b/.github/workflows/check-eol-newrelease.yml
@@ -15,7 +15,7 @@ jobs:
     if: github.repository == 'line/line-bot-sdk-python'
     steps:
       - name: Check out code
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: Run EoL & NewRelease check
         uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
diff --git a/.github/workflows/create-draft-release.yml b/.github/workflows/create-draft-release.yml
index a5e1c32b4..fe890f2b3 100644
--- a/.github/workflows/create-draft-release.yml
+++ b/.github/workflows/create-draft-release.yml
@@ -45,7 +45,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Fetch Latest Release
         id: get-latest-release
         uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
diff --git a/.github/workflows/generate-code.yml b/.github/workflows/generate-code.yml
index ce320648d..56ab2e1cd 100644
--- a/.github/workflows/generate-code.yml
+++ b/.github/workflows/generate-code.yml
@@ -16,7 +16,7 @@ jobs:
       pull-requests: write
     steps:
       - name: Setup
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           submodules: recursive
       - name: Update submodules
diff --git a/.github/workflows/label-issue.yml b/.github/workflows/label-issue.yml
index 170279610..9f27ed7d4 100644
--- a/.github/workflows/label-issue.yml
+++ b/.github/workflows/label-issue.yml
@@ -13,7 +13,7 @@ jobs:
     permissions:
       issues: write
     steps:
-      - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: Add label on issue open
         if: github.event.action == 'opened' || github.event.action == 'reopened'
diff --git a/.github/workflows/publish-to-pypi.yml b/.github/workflows/publish-to-pypi.yml
index f7af419ef..6f0bf3038 100644
--- a/.github/workflows/publish-to-pypi.yml
+++ b/.github/workflows/publish-to-pypi.yml
@@ -18,7 +18,7 @@ jobs:
     permissions:
       issues: write
     steps:
-    - uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+    - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       with:
         submodules: true
     - name: Set up Python