diff --git a/MyNumberNET_Test/MyNumberNET_Test.csproj b/MyNumberNET_Test/MyNumberNET_Test.csproj
index a24a6e3..3b3038c 100644
--- a/MyNumberNET_Test/MyNumberNET_Test.csproj
+++ b/MyNumberNET_Test/MyNumberNET_Test.csproj
@@ -13,7 +13,7 @@
   <ItemGroup>
     <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="MSTest.TestFramework" Version="4.2.1" />
     <PackageReference Include="xunit" Version="2.9.3" />
   </ItemGroup>
   <ItemGroup>