diff --git a/test/FluentRest.Tests/FluentRest.Tests.csproj b/test/FluentRest.Tests/FluentRest.Tests.csproj
index cb2280e..0b127c8 100644
--- a/test/FluentRest.Tests/FluentRest.Tests.csproj
+++ b/test/FluentRest.Tests/FluentRest.Tests.csproj
@@ -15,6 +15,7 @@
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Http" Version="8.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
+    <PackageReference Include="System.Text.Json" Version="8.0.4" />
     <PackageReference Include="Testcontainers" Version="3.9.0" />
     <PackageReference Include="XUnit.Hosting" Version="1.7.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">