diff --git a/MyNumberNET_Test/MyNumberNET_Test.csproj b/MyNumberNET_Test/MyNumberNET_Test.csproj
index a02ca83..fbf095f 100644
--- a/MyNumberNET_Test/MyNumberNET_Test.csproj
+++ b/MyNumberNET_Test/MyNumberNET_Test.csproj
@@ -19,7 +19,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.10.4" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.10.4" />
+    <PackageReference Include="MSTest.TestFramework" Version="4.0.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <!-- Other test dependencies -->
   </ItemGroup>