diff --git a/BuildingControllerTests/SmartBuildingTests.csproj b/BuildingControllerTests/SmartBuildingTests.csproj
index aeee83f..c0e04dd 100644
--- a/BuildingControllerTests/SmartBuildingTests.csproj
+++ b/BuildingControllerTests/SmartBuildingTests.csproj
@@ -13,7 +13,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.8.0" />
-    <PackageReference Include="NSubstitute" Version="5.1.0" />
+    <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="NUnit" Version="4.0.1" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
   </ItemGroup>