diff --git a/Directory.Build.targets b/Directory.Build.targets
index e83ff95e39..894b1d0cf8 100644
--- a/Directory.Build.targets
+++ b/Directory.Build.targets
@@ -1,5 +1,6 @@
 <Project>
   <PropertyGroup>
     <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp2.0' ">$(MicrosoftNETCoreApp20PackageVersion)</RuntimeFrameworkVersion>
+    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp2.1' ">$(MicrosoftNETCoreApp21PackageVersion)</RuntimeFrameworkVersion>
   </PropertyGroup>
 </Project>
diff --git a/build/dependencies.props b/build/dependencies.props
index 410f1c8697..fa9a01ce97 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -9,6 +9,7 @@
     <MicrosoftExtensionsDependencyInjectionPackageVersion>2.1.0-preview1-27488</MicrosoftExtensionsDependencyInjectionPackageVersion>
     <MicrosoftExtensionsOptionsPackageVersion>2.1.0-preview1-27488</MicrosoftExtensionsOptionsPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-25907-02</MicrosoftNETCoreApp21PackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.3.0</MicrosoftNETTestSdkPackageVersion>
     <SystemTextEncodingsWebPackageVersion>4.4.0</SystemTextEncodingsWebPackageVersion>
     <XunitPackageVersion>2.3.0</XunitPackageVersion>