diff --git a/test/A3.MinimalApiValidation.Tests/A3.MinimalApiValidation.Tests.csproj b/test/A3.MinimalApiValidation.Tests/A3.MinimalApiValidation.Tests.csproj
index 8ff5d91..c024e4d 100644
--- a/test/A3.MinimalApiValidation.Tests/A3.MinimalApiValidation.Tests.csproj
+++ b/test/A3.MinimalApiValidation.Tests/A3.MinimalApiValidation.Tests.csproj
@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.8" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.7.0" />
-    <PackageReference Include="NSubstitute" Version="5.3.0" />
+    <PackageReference Include="NSubstitute" Version="6.0.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.5">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>