diff --git a/tests/OneWare.PackageManager.UnitTests/OneWare.PackageManager.UnitTests.csproj b/tests/OneWare.PackageManager.UnitTests/OneWare.PackageManager.UnitTests.csproj
index 99d7614c..cb7b3b94 100644
--- a/tests/OneWare.PackageManager.UnitTests/OneWare.PackageManager.UnitTests.csproj
+++ b/tests/OneWare.PackageManager.UnitTests/OneWare.PackageManager.UnitTests.csproj
@@ -14,7 +14,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="NSubstitute" Version="5.3.0"/>
+        <PackageReference Include="NSubstitute" Version="6.0.0"/>
     </ItemGroup>
 
     <ItemGroup>