diff --git a/src/GraphQL.Client/GraphQL.Client.csproj b/src/GraphQL.Client/GraphQL.Client.csproj
index 366ee893..53e9585e 100644
--- a/src/GraphQL.Client/GraphQL.Client.csproj
+++ b/src/GraphQL.Client/GraphQL.Client.csproj
@@ -11,10 +11,6 @@
 		<TargetFrameworks>netstandard1.1;netstandard1.3;netstandard2.0</TargetFrameworks>
 	</PropertyGroup>
 
-	<ItemGroup>
-		<PackageReference Include="Newtonsoft.Json" Version="10.0.3" />
-	</ItemGroup>
-
 	<ItemGroup>
 		<ProjectReference Include="..\GraphQL.Common\GraphQL.Common.csproj" />
 	</ItemGroup>
diff --git a/src/GraphQL.Common/GraphQL.Common.csproj b/src/GraphQL.Common/GraphQL.Common.csproj
index e7e73676..363a2030 100644
--- a/src/GraphQL.Common/GraphQL.Common.csproj
+++ b/src/GraphQL.Common/GraphQL.Common.csproj
@@ -13,6 +13,7 @@
 
 	<ItemGroup>
 		<PackageReference Include="Microsoft.CSharp" Version="4.4.1" />
+		<PackageReference Include="Newtonsoft.Json" Version="11.0.1" />
 	</ItemGroup>
 
 </Project>
diff --git a/src/GraphQL.Common/Response/GraphQLError.cs b/src/GraphQL.Common/Response/GraphQLError.cs
index 70ad1af0..a056418b 100644
--- a/src/GraphQL.Common/Response/GraphQLError.cs
+++ b/src/GraphQL.Common/Response/GraphQLError.cs
@@ -1,3 +1,7 @@
+using System.Collections.Generic;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
 namespace GraphQL.Common.Response {
 
 	/// <summary>
@@ -15,6 +19,12 @@ public class GraphQLError {
 		/// </summary>
 		public GraphQLLocation[] Locations { get; set; }
 
+		/// <summary>
+		/// Additional error entries
+		/// </summary>
+		[JsonExtensionData]
+		public IDictionary<string, JToken> AdditonalEntries { get; set; }
+
 	}
 
 }
diff --git a/tests/GraphQL.Client.Tests/GraphQL.Client.Tests.csproj b/tests/GraphQL.Client.Tests/GraphQL.Client.Tests.csproj
index 2af711b9..6b9ef96c 100644
--- a/tests/GraphQL.Client.Tests/GraphQL.Client.Tests.csproj
+++ b/tests/GraphQL.Client.Tests/GraphQL.Client.Tests.csproj
@@ -12,4 +12,8 @@
 		<ProjectReference Include="..\GraphQL.Common.Tests\GraphQL.Common.Tests.csproj" />
 	</ItemGroup>
 
-</Project>
\ No newline at end of file
+	<ItemGroup>
+	  <Service Include="{82a7f48d-3b50-4b1e-b82e-3ada8210c358}" />
+	</ItemGroup>
+
+</Project>