diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3d38bf5..7b06c4d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
         fetch-depth: 0 # avoid shallow clone so nbgv can do its work.
 
     - name: Setup .NET
-      uses: actions/setup-dotnet@v4
+      uses: actions/setup-dotnet@v5
       with:
         dotnet-version: '10.0.x'
 
@@ -55,7 +55,7 @@ jobs:
         path: ./artifacts
 
     - name: Setup .NET
-      uses: actions/setup-dotnet@v4
+      uses: actions/setup-dotnet@v5
       with:
         dotnet-version: '10.0.x'
 
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index f74b787..9c93735 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -32,7 +32,7 @@ jobs:
           languages: ${{ matrix.language }}
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: '10.0.x'