diff --git a/Difficalcy.Tests/Difficalcy.Tests.csproj b/Difficalcy.Tests/Difficalcy.Tests.csproj
index a15ebdb..b20daab 100644
--- a/Difficalcy.Tests/Difficalcy.Tests.csproj
+++ b/Difficalcy.Tests/Difficalcy.Tests.csproj
@@ -8,7 +8,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>