diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4aa179f..a0a53d2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest    
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0 # avoid shallow clone so nbgv can do its work.
 
diff --git a/.github/workflows/tag.yml b/.github/workflows/tag.yml
index d268e4f..96c5064 100644
--- a/.github/workflows/tag.yml
+++ b/.github/workflows/tag.yml
@@ -11,7 +11,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
@@ -33,7 +33,7 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0 # avoid shallow clone so nbgv can do its work.