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 ba20d698d6..3072c1d6e4 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -8,6 +8,7 @@
     <MicrosoftCSharpPackageVersion>4.4.0</MicrosoftCSharpPackageVersion>
     <MicrosoftExtensionsClosedGenericMatcherSourcesPackageVersion>2.1.0-preview1-27497</MicrosoftExtensionsClosedGenericMatcherSourcesPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-25907-02</MicrosoftNETCoreApp21PackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.3.0</MicrosoftNETTestSdkPackageVersion>
     <MoqPackageVersion>4.7.49</MoqPackageVersion>
     <NewtonsoftJsonPackageVersion>10.0.1</NewtonsoftJsonPackageVersion>