diff --git a/backend/tests/InvestOps.UnitTests/InvestOps.UnitTests.csproj b/backend/tests/InvestOps.UnitTests/InvestOps.UnitTests.csproj
index fc1ffac..0e1ac5c 100644
--- a/backend/tests/InvestOps.UnitTests/InvestOps.UnitTests.csproj
+++ b/backend/tests/InvestOps.UnitTests/InvestOps.UnitTests.csproj
@@ -12,7 +12,7 @@
   <ItemGroup>
     <PackageReference Include="coverlet.collector" Version="6.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageReference Include="NSubstitute" Version="5.3.0" />
+    <PackageReference Include="NSubstitute" Version="6.0.0" />
     <PackageReference Include="xunit" Version="2.5.3" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.5.3" />
     <!-- Pins de segurança: transitivos vulneráveis herdados do tooling de teste (GHSA-7jgj-8wvc-jh57, GHSA-cmhx-cq75-c4mj) -->