diff --git a/.github/workflows/check-general-formatting.yml b/.github/workflows/check-general-formatting.yml
index 076c878..b4b254b 100644
--- a/.github/workflows/check-general-formatting.yml
+++ b/.github/workflows/check-general-formatting.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install editorconfig-checker
         uses: editorconfig-checker/action-editorconfig-checker@v2
diff --git a/.github/workflows/check-license.yml b/.github/workflows/check-license.yml
index 93406e2..8fd1830 100644
--- a/.github/workflows/check-license.yml
+++ b/.github/workflows/check-license.yml
@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install Ruby
         uses: ruby/setup-ruby@v1
diff --git a/.github/workflows/check-markdown.yml b/.github/workflows/check-markdown.yml
index 400413a..d6feeb0 100644
--- a/.github/workflows/check-markdown.yml
+++ b/.github/workflows/check-markdown.yml
@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Initialize markdownlint-cli problem matcher
         uses: xt0rted/markdownlint-problem-matcher@v3
@@ -50,7 +50,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Determine whether only modified files should be checked
         id: check-modified
diff --git a/.github/workflows/check-prettier-formatting.yml b/.github/workflows/check-prettier-formatting.yml
index 7fd3cec..d1fc7d0 100644
--- a/.github/workflows/check-prettier-formatting.yml
+++ b/.github/workflows/check-prettier-formatting.yml
@@ -212,7 +212,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install Prettier
         run: sudo npm install --global prettier
diff --git a/.github/workflows/check-toc.yml b/.github/workflows/check-toc.yml
index 9d82643..58dd815 100644
--- a/.github/workflows/check-toc.yml
+++ b/.github/workflows/check-toc.yml
@@ -29,7 +29,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Install markdown-toc
         run: sudo npm install --global markdown-toc
diff --git a/.github/workflows/check-workflows.yml b/.github/workflows/check-workflows.yml
index ad67f95..cc8369f 100644
--- a/.github/workflows/check-workflows.yml
+++ b/.github/workflows/check-workflows.yml
@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Download JSON schema for GitHub Actions workflows
         id: download-schema
diff --git a/.github/workflows/check-yaml.yml b/.github/workflows/check-yaml.yml
index 4c057b1..71a706f 100644
--- a/.github/workflows/check-yaml.yml
+++ b/.github/workflows/check-yaml.yml
@@ -67,7 +67,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Check YAML
         # yamllint's "colored" output type is useful for humans reading the log.
diff --git a/.github/workflows/spell-check.yml b/.github/workflows/spell-check.yml
index 9cda312..a022ed6 100644
--- a/.github/workflows/spell-check.yml
+++ b/.github/workflows/spell-check.yml
@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Spell check
         uses: codespell-project/actions-codespell@master
diff --git a/.github/workflows/sync-labels.yml b/.github/workflows/sync-labels.yml
index 9873387..9ea8407 100644
--- a/.github/workflows/sync-labels.yml
+++ b/.github/workflows/sync-labels.yml
@@ -27,7 +27,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Download JSON schema for labels configuration file
         id: download-schema
@@ -106,7 +106,7 @@ jobs:
           echo "::set-output name=flag::--dry-run"
 
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Download configuration file artifacts
         uses: actions/download-artifact@v6