diff --git a/lang/csharp/test/sourcepp.test.csproj b/lang/csharp/test/sourcepp.test.csproj
index cb4a60d0..f329f833 100644
--- a/lang/csharp/test/sourcepp.test.csproj
+++ b/lang/csharp/test/sourcepp.test.csproj
@@ -17,9 +17,9 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
-    <PackageReference Include="MSTest.TestAdapter" Version="4.1.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="4.1.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="4.2.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="4.2.1" />
   </ItemGroup>
 
   <ItemGroup>