diff --git a/Proxytrace.Licensing.Tests/Proxytrace.Licensing.Tests.csproj b/Proxytrace.Licensing.Tests/Proxytrace.Licensing.Tests.csproj
index b9ba2223d..8fb2600fd 100644
--- a/Proxytrace.Licensing.Tests/Proxytrace.Licensing.Tests.csproj
+++ b/Proxytrace.Licensing.Tests/Proxytrace.Licensing.Tests.csproj
@@ -18,7 +18,7 @@
         </PackageReference>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.5.1" />
         <PackageReference Include="MSTest" Version="4.2.2" />
-        <PackageReference Include="NSubstitute" Version="5.3.0" />
+        <PackageReference Include="NSubstitute" Version="6.0.0" />
         <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="10.0.9" />
     </ItemGroup>
 
diff --git a/Proxytrace.Testing/Proxytrace.Testing.csproj b/Proxytrace.Testing/Proxytrace.Testing.csproj
index 7ab88e6db..f392fdf14 100644
--- a/Proxytrace.Testing/Proxytrace.Testing.csproj
+++ b/Proxytrace.Testing/Proxytrace.Testing.csproj
@@ -13,7 +13,7 @@
       <PackageReference Include="Microsoft.AspNetCore.DataProtection" Version="10.0.9" />
       <PackageReference Include="Microsoft.Extensions.Logging" Version="10.0.9" />
       <PackageReference Include="MSTest.TestFramework" Version="4.2.2" />
-      <PackageReference Include="NSubstitute" Version="5.3.0" />
+      <PackageReference Include="NSubstitute" Version="6.0.0" />
     </ItemGroup>
 
     <ItemGroup>