diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index c635923..2f645de 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -56,7 +56,7 @@ jobs:
         # your codebase is analyzed, see https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/markdownlint.yml b/.github/workflows/markdownlint.yml
index 5accf22..3310b3a 100644
--- a/.github/workflows/markdownlint.yml
+++ b/.github/workflows/markdownlint.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Use Node.js
       uses: actions/setup-node@v6
       with:
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index ff67b40..72fe437 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -18,7 +18,7 @@ jobs:
         dotnet-version: [ '10.0' ]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Setup .NET Core SDK ${{ matrix.dotnet-version }}
       uses: actions/setup-dotnet@v5
       with:
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index dea66fc..0ac6c47 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -16,7 +16,7 @@ jobs:
         dotnet-version: [ '10.0' ]
 
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Setup .NET Core SDK ${{ matrix.dotnet-version }}
       uses: actions/setup-dotnet@v5
       with: