diff --git a/test/MimeMapping.Tests/MimeMapping.Tests.csproj b/test/MimeMapping.Tests/MimeMapping.Tests.csproj
index 81e9cf0..f3e55b9 100644
--- a/test/MimeMapping.Tests/MimeMapping.Tests.csproj
+++ b/test/MimeMapping.Tests/MimeMapping.Tests.csproj
@@ -8,8 +8,8 @@
   
   <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.TestAdapter" Version="4.2.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="4.2.1" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(TargetFramework)' == 'net48'">