diff --git a/CreativeCode.JWK.Tests/CreativeCode.JWK.Tests.csproj b/CreativeCode.JWK.Tests/CreativeCode.JWK.Tests.csproj
index bba75f3..0f2c5d1 100644
--- a/CreativeCode.JWK.Tests/CreativeCode.JWK.Tests.csproj
+++ b/CreativeCode.JWK.Tests/CreativeCode.JWK.Tests.csproj
@@ -13,6 +13,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="xunit" Version="2.9.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2"><IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>