diff --git a/samples/WebApi.Shared/WebApi.Shared.csproj b/samples/WebApi.Shared/WebApi.Shared.csproj
index 7ef6514e..9031f0a4 100644
--- a/samples/WebApi.Shared/WebApi.Shared.csproj
+++ b/samples/WebApi.Shared/WebApi.Shared.csproj
@@ -31,4 +31,10 @@
     <PackageReference Update="Microsoft.SourceLink.GitHub" Version="8.0.0" />
   </ItemGroup>
 
+
+
+  <ItemGroup>
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+  </ItemGroup>
+
 </Project>
diff --git a/samples/net472/SAPWebAPI/SAPWebAPI.csproj b/samples/net472/SAPWebAPI/SAPWebAPI.csproj
index e59c12f1..c8fe3332 100644
--- a/samples/net472/SAPWebAPI/SAPWebAPI.csproj
+++ b/samples/net472/SAPWebAPI/SAPWebAPI.csproj
@@ -25,6 +25,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="2.1.3" />
     <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel.Core" Version="2.1.25" />
     <PackageReference Include="Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets" Version="2.1.40" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="System.Security.Cryptography.Xml" Version="8.0.1" />
     <PackageReference Include="System.Text.Encodings.Web" Version="8.0.0" />
   </ItemGroup>
diff --git a/test/YaNco.Core.Tests/YaNco.Core.Tests.csproj b/test/YaNco.Core.Tests/YaNco.Core.Tests.csproj
index 7baa3af7..52af3c7e 100644
--- a/test/YaNco.Core.Tests/YaNco.Core.Tests.csproj
+++ b/test/YaNco.Core.Tests/YaNco.Core.Tests.csproj
@@ -11,6 +11,7 @@
     <PackageReference Include="AutoFixture.AutoMoq" Version="4.18.1" />
     <PackageReference Include="AutoFixture.Xunit2" Version="4.18.1" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
+    <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
     <PackageReference Include="System.ComponentModel.TypeConverter" Version="4.3.0" />
     <PackageReference Include="xunit" Version="2.8.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">