diff --git a/Octokit.Tests.Conventions/Octokit.Tests.Conventions.csproj b/Octokit.Tests.Conventions/Octokit.Tests.Conventions.csproj
index 4802e102..1328bc84 100644
--- a/Octokit.Tests.Conventions/Octokit.Tests.Conventions.csproj
+++ b/Octokit.Tests.Conventions/Octokit.Tests.Conventions.csproj
@@ -5,7 +5,7 @@
     <AssemblyTitle>Octokit.Tests.Conventions</AssemblyTitle>
     <Authors>GitHub</Authors>
     <CoreOnly Condition="$(CoreOnly) == '' and $([MSBuild]::IsOsPlatform('Windows'))">False</CoreOnly>
-    <TargetFrameworks>netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
     <TargetFrameworks Condition="$(CoreOnly) != '' and !$(CoreOnly)">$(TargetFrameworks);net452</TargetFrameworks>
     <NoWarn>$(NoWarn);CS4014;CS1998</NoWarn>
     <AssemblyName>Octokit.Tests.Conventions</AssemblyName>
@@ -35,7 +35,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
   </ItemGroup>
diff --git a/Octokit.Tests.Integration/Octokit.Tests.Integration.csproj b/Octokit.Tests.Integration/Octokit.Tests.Integration.csproj
index 8506da0b..1a3eaf34 100644
--- a/Octokit.Tests.Integration/Octokit.Tests.Integration.csproj
+++ b/Octokit.Tests.Integration/Octokit.Tests.Integration.csproj
@@ -5,7 +5,7 @@
     <AssemblyTitle>Octokit.Tests.Integration</AssemblyTitle>
     <Authors>GitHub</Authors>
     <CoreOnly Condition="$(CoreOnly) == '' and $([MSBuild]::IsOsPlatform('Windows'))">False</CoreOnly>
-    <TargetFrameworks>netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
     <TargetFrameworks Condition="$(CoreOnly) != '' and !$(CoreOnly)">$(TargetFrameworks);net452</TargetFrameworks>
     <NoWarn>$(NoWarn);CS4014;CS1998</NoWarn>
     <AssemblyName>Octokit.Tests.Integration</AssemblyName>
@@ -38,7 +38,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
   </ItemGroup>
diff --git a/Octokit.Tests/Octokit.Tests.csproj b/Octokit.Tests/Octokit.Tests.csproj
index b468ced0..5335be34 100644
--- a/Octokit.Tests/Octokit.Tests.csproj
+++ b/Octokit.Tests/Octokit.Tests.csproj
@@ -5,7 +5,7 @@
     <AssemblyTitle>Octokit.Tests</AssemblyTitle>
     <Authors>GitHub</Authors>
     <CoreOnly Condition="$(CoreOnly) == '' and $([MSBuild]::IsOsPlatform('Windows'))">False</CoreOnly>
-    <TargetFrameworks>netcoreapp2.0</TargetFrameworks>
+    <TargetFrameworks>netcoreapp2.1</TargetFrameworks>
     <TargetFrameworks Condition="$(CoreOnly) != '' and !$(CoreOnly)">$(TargetFrameworks);net452</TargetFrameworks>
     <NoWarn>$(NoWarn);CS4014;CS1998</NoWarn>
     <AssemblyName>Octokit.Tests</AssemblyName>
@@ -39,7 +39,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
   </ItemGroup>
diff --git a/Octokit/Octokit.csproj b/Octokit/Octokit.csproj
index 7168499f..c0bfc52b 100644
--- a/Octokit/Octokit.csproj
+++ b/Octokit/Octokit.csproj
@@ -20,11 +20,12 @@
     <Copyright>Copyright GitHub 2017</Copyright>
   </PropertyGroup>
 
-  <PropertyGroup Condition=" '$(TargetFramework)' == 'netstandard1.1' or '$(TargetFramework)' == 'netstandard2.0'  ">
-    <DefineConstants>$(DefineConstants);HAS_TYPEINFO;SIMPLE_JSON_INTERNAL;SIMPLE_JSON_OBJARRAYINTERNAL;SIMPLE_JSON_READONLY_COLLECTIONS;SIMPLE_JSON_TYPEINFO;NO_SERIALIZABLE</DefineConstants>
+  <PropertyGroup Condition=" '$(TargetFramework)' == 'netstandard1.1' or '$(TargetFramework)' == 'netstandard2.0' ">
+    <DefineConstants>$(DefineConstants);HAS_TYPEINFO;SIMPLE_JSON_INTERNAL;SIMPLE_JSON_OBJARRAYINTERNAL;SIMPLE_JSON_READONLY_COLLECTIONS;SIMPLE_JSON_TYPEINFO</DefineConstants>
   </PropertyGroup>
 
   <PropertyGroup Condition=" '$(TargetFramework)' == 'netstandard1.1' ">
+    <DefineConstants>$(DefineConstants);NO_SERIALIZABLE</DefineConstants>
     <NetStandardImplicitPackageVersion>1.6.0</NetStandardImplicitPackageVersion>
   </PropertyGroup>
 
diff --git a/build/Tasks/CodeCoverage.cs b/build/Tasks/CodeCoverage.cs
index 82c7e889..23c89bfc 100644
--- a/build/Tasks/CodeCoverage.cs
+++ b/build/Tasks/CodeCoverage.cs
@@ -21,13 +21,13 @@ public sealed class CodeCoverage : FrostingTask<Context>
                 context.Information("Executing Code Coverage for Project {0}...", project.Name);
 
                 var dotNetCoreCoverage = context.CodeCoverage
-                    .CombineWithFilePath(project.Name + "-netcoreapp2.0.xml");
+                    .CombineWithFilePath(project.Name + "-netcoreapp2.1.xml");
                 coverageFiles.Add(dotNetCoreCoverage);
 
                 context.Coverlet(project, new CoverletToolSettings()
                 {
                     Configuration = context.Configuration,
-                    Framework = "netcoreapp2.0",
+                    Framework = "netcoreapp2.1",
                     Output = dotNetCoreCoverage.FullPath
                 });