diff --git a/.github/workflows/all_url_check.yml b/.github/workflows/all_url_check.yml
index 79df3ea..294cd06 100644
--- a/.github/workflows/all_url_check.yml
+++ b/.github/workflows/all_url_check.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: link_check with lychee-action
         id: link_check
diff --git a/.github/workflows/build_document.yml b/.github/workflows/build_document.yml
index 4eaed3b..e1166d6 100644
--- a/.github/workflows/build_document.yml
+++ b/.github/workflows/build_document.yml
@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           token: ${{secrets.PUSH_TOKEN}}
 
diff --git a/.github/workflows/check_shell_scripts.yml b/.github/workflows/check_shell_scripts.yml
index ade571c..1662de4 100644
--- a/.github/workflows/check_shell_scripts.yml
+++ b/.github/workflows/check_shell_scripts.yml
@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: Install shellcheck
         run: |
diff --git a/.github/workflows/chktex.yml b/.github/workflows/chktex.yml
index 3d13140..9f4737d 100644
--- a/.github/workflows/chktex.yml
+++ b/.github/workflows/chktex.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: LaTeX linter
         uses: colinaaa/chktex-action@5dda098b973d69cdc61ace93fa7bfcef39efaade # v1.1.2
diff --git a/.github/workflows/pdf_check.yml b/.github/workflows/pdf_check.yml
index b468c2e..933ee5d 100644
--- a/.github/workflows/pdf_check.yml
+++ b/.github/workflows/pdf_check.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
 
       - name: Install qpdf
         run: |
diff --git a/.github/workflows/python_test.yml b/.github/workflows/python_test.yml
index 3d00cea..b57b485 100644
--- a/.github/workflows/python_test.yml
+++ b/.github/workflows/python_test.yml
@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
       - name: Set up Python ${{matrix.python-version}}
         uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
diff --git a/.github/workflows/sonarcloud_check.yml b/.github/workflows/sonarcloud_check.yml
index b56e293..62ad9fa 100644
--- a/.github/workflows/sonarcloud_check.yml
+++ b/.github/workflows/sonarcloud_check.yml
@@ -18,7 +18,7 @@ jobs:
     steps:
 
       - name: Checkout
-        uses: actions/checkout@93cb6efe18208431cddfb8368fd83d5badbf9bfd # v5.0.1
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
         with:
           fetch-depth: 0