diff --git a/src/ServiceInsight.Tests/ServiceInsight.Tests.csproj b/src/ServiceInsight.Tests/ServiceInsight.Tests.csproj
index b672678f..37e4ec5a 100644
--- a/src/ServiceInsight.Tests/ServiceInsight.Tests.csproj
+++ b/src/ServiceInsight.Tests/ServiceInsight.Tests.csproj
@@ -21,7 +21,7 @@
     <PackageReference Include="ApprovalTests.Wpf" Version="[3.0.18,4.0.0]" />
     <PackageReference Include="GitHubActionsTestLogger" Version="3.0.4" />
     <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="NUnit" Version="4.5.1" />
     <PackageReference Include="NUnit.Analyzers" Version="4.14.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="6.2.0" />