diff --git a/Directory.Build.targets b/Directory.Build.targets
index 2991ae3052..73b97f2807 100644
--- a/Directory.Build.targets
+++ b/Directory.Build.targets
@@ -1,5 +1,6 @@
 <Project>
   <PropertyGroup>
+    <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp2.1' ">$(MicrosoftNETCoreApp21PackageVersion)</RuntimeFrameworkVersion>
     <RuntimeFrameworkVersion Condition=" '$(TargetFramework)' == 'netcoreapp2.2' ">$(MicrosoftNETCoreApp22PackageVersion)</RuntimeFrameworkVersion>
     <NETStandardImplicitPackageVersion Condition=" '$(TargetFramework)' == 'netstandard2.0' ">$(NETStandardLibrary20PackageVersion)</NETStandardImplicitPackageVersion>
     <!-- aspnet/BuildTools#662 Don't police what version of NetCoreApp we use -->
diff --git a/build/dependencies.props b/build/dependencies.props
index 30e501b263..1a036601a3 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -24,6 +24,7 @@
     <MicrosoftExtensionsLoggingTestingPackageVersion>3.0.0-alpha1-10044</MicrosoftExtensionsLoggingTestingPackageVersion>
     <MicrosoftExtensionsOptionsConfigurationExtensionsPackageVersion>3.0.0-alpha1-10044</MicrosoftExtensionsOptionsConfigurationExtensionsPackageVersion>
     <MicrosoftExtensionsOptionsPackageVersion>3.0.0-alpha1-10044</MicrosoftExtensionsOptionsPackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.2</MicrosoftNETCoreApp21PackageVersion>
     <MicrosoftNETCoreApp22PackageVersion>2.2.0-preview1-26618-02</MicrosoftNETCoreApp22PackageVersion>
     <MicrosoftNetHttpHeadersPackageVersion>3.0.0-alpha1-10044</MicrosoftNetHttpHeadersPackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.6.1</MicrosoftNETTestSdkPackageVersion>