diff --git a/.Src/Extend/Extend.csproj b/.Src/Extend/Extend.csproj
index 2a031e57..535f8053 100644
--- a/.Src/Extend/Extend.csproj
+++ b/.Src/Extend/Extend.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>netstandard1.1</TargetFramework>
+    <TargetFrameworks>netstandard1.1;netstandard2.1</TargetFrameworks>
     <AssemblyName>Extend</AssemblyName>
     <RootNamespace>Extend</RootNamespace>
     <PackageId>Extend</PackageId>