diff --git a/Directory.Build.props b/Directory.Build.props
index 46af06b..49a5c13 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -2,7 +2,7 @@
 <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ItemGroup>
     <PackageReference Include="Nerdbank.GitVersioning">
-      <Version>3.0.28</Version>
+      <Version>3.4.240</Version>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
   </ItemGroup>
diff --git a/appveyor.yml b/appveyor.yml
index 600508b..a09b196 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -12,7 +12,7 @@ install:
   - set PATH_COPY=%PATH%
   - set PATH=%PATH%;c:\tools\vcpkg\installed\x86-windows\tools\capnproto
   - cd %APPVEYOR_BUILD_FOLDER%
-  - dotnet tool install -g nbgv --version 3.1.74
+  - dotnet tool install -g nbgv --version 3.4.240
   - choco install reportgenerator.portable --version=4.5.6 --force -y
   - dotnet tool install -g coveralls.net --version 1.0.0
 init: