diff --git a/CSharp/C2-PortfolioTreePrinter-Exercise/PortfolioTreePrinter-Exercise.UnitTests/PortfolioTreePrinter-Exercise.UnitTests.csproj b/CSharp/C2-PortfolioTreePrinter-Exercise/PortfolioTreePrinter-Exercise.UnitTests/PortfolioTreePrinter-Exercise.UnitTests.csproj
index 904c55f..71c6ae6 100644
--- a/CSharp/C2-PortfolioTreePrinter-Exercise/PortfolioTreePrinter-Exercise.UnitTests/PortfolioTreePrinter-Exercise.UnitTests.csproj
+++ b/CSharp/C2-PortfolioTreePrinter-Exercise/PortfolioTreePrinter-Exercise.UnitTests/PortfolioTreePrinter-Exercise.UnitTests.csproj
@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.0.1">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>