diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index 58fc943..5e31376 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -39,7 +39,7 @@ jobs:
 
     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/dotnet.yml b/.github/workflows/dotnet.yml
index 035a75e..6c2c9c0 100644
--- a/.github/workflows/dotnet.yml
+++ b/.github/workflows/dotnet.yml
@@ -8,7 +8,7 @@ jobs:
   build:
     runs-on: ubuntu-22.04
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
       with:
@@ -26,7 +26,7 @@ jobs:
     needs: build
     if: ${{ github.event_name == 'push' }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: publish on version change
       id: publish_nuget
       uses: rohith/publish-nuget@v2
@@ -39,7 +39,7 @@ jobs:
     if: ${{ github.event_name == 'push' }}
     needs: build
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: mattnotmitt/doxygen-action@v1
       - name: Deploy
         uses: peaceiris/actions-gh-pages@v4