diff --git a/SpecsXUnit.csproj b/SpecsXUnit.csproj
index c76bc66..e05d319 100644
--- a/SpecsXUnit.csproj
+++ b/SpecsXUnit.csproj
@@ -6,6 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3"><IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 <PrivateAssets>all</PrivateAssets>