diff --git a/csharp/tests/Contriwork.Notifications.Tests/Contriwork.Notifications.Tests.csproj b/csharp/tests/Contriwork.Notifications.Tests/Contriwork.Notifications.Tests.csproj
index 2206f08..4bb628e 100644
--- a/csharp/tests/Contriwork.Notifications.Tests/Contriwork.Notifications.Tests.csproj
+++ b/csharp/tests/Contriwork.Notifications.Tests/Contriwork.Notifications.Tests.csproj
@@ -10,7 +10,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
     <PackageReference Include="xunit" Version="2.9.2" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>