diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index e0af212febc..e64000fbbc7 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -1,49 +1,49 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.Win32.Registry" Version="4.6.0-preview.19112.2">
+    <Dependency Name="Microsoft.Win32.Registry" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
-    <Dependency Name="System.Configuration.ConfigurationManager" Version="4.6.0-preview.19112.2">
+    <Dependency Name="System.Configuration.ConfigurationManager" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
-    <Dependency Name="System.Diagnostics.EventLog" Version="4.6.0-preview.19112.2">
+    <Dependency Name="System.Diagnostics.EventLog" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
-    <Dependency Name="System.Reflection.Emit" Version="4.6.0-preview.19112.2">
+    <Dependency Name="System.Reflection.Emit" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
-    <Dependency Name="System.Reflection.TypeExtensions" Version="4.6.0-preview.19112.2">
+    <Dependency Name="System.Reflection.TypeExtensions" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
-    <Dependency Name="System.Security.AccessControl" Version="4.6.0-preview.19112.2">
+    <Dependency Name="System.Security.AccessControl" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
-    <Dependency Name="System.Security.Cryptography.Xml" Version="4.6.0-preview.19112.2">
+    <Dependency Name="System.Security.Cryptography.Xml" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
-    <Dependency Name="System.Security.Permissions" Version="4.6.0-preview.19112.2">
+    <Dependency Name="System.Security.Permissions" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
-    <Dependency Name="System.Security.Principal.Windows" Version="4.6.0-preview.19112.2">
+    <Dependency Name="System.Security.Principal.Windows" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
-    <Dependency Name="System.Windows.Extensions" Version="4.6.0-preview.19112.2">
+    <Dependency Name="System.Windows.Extensions" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
-    <Dependency Name="System.CodeDom" Version="4.6.0-preview.19112.2">
+    <Dependency Name="System.CodeDom" Version="4.6.0-preview.19112.21">
       <Uri>https://github.com/dotnet/corefx</Uri>
-      <Sha>24450dad74b0df3fc81026d7726b8441c41ae429</Sha>
+      <Sha>f15d18e904534a1dcadfd86a17340950d1d06e21</Sha>
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
diff --git a/eng/Versions.props b/eng/Versions.props
index ad4aa36e8c5..a1d969f4f99 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -8,17 +8,17 @@
   <!-- NuGet Package Versions -->
   <PropertyGroup>
     <!-- Packages that come from https://github.com/dotnet/corefx -->
-    <MicrosoftWin32RegistryPackageVersion>4.6.0-preview.19112.2</MicrosoftWin32RegistryPackageVersion>
-    <SystemConfigurationConfigurationManagerPackageVersion>4.6.0-preview.19112.2</SystemConfigurationConfigurationManagerPackageVersion>
-    <SystemDiagnosticsEventLogPackageVersion>4.6.0-preview.19112.2</SystemDiagnosticsEventLogPackageVersion>
-    <SystemReflectionEmitPackageVersion>4.6.0-preview.19112.2</SystemReflectionEmitPackageVersion>
-    <SystemReflectionTypeExtensionsPackageVersion>4.6.0-preview.19112.2</SystemReflectionTypeExtensionsPackageVersion>
-    <SystemSecurityAccessControlPackageVersion>4.6.0-preview.19112.2</SystemSecurityAccessControlPackageVersion>
-    <SystemSecurityCryptographyXmlPackageVersion>4.6.0-preview.19112.2</SystemSecurityCryptographyXmlPackageVersion>
-    <SystemSecurityPermissionsPackageVersion>4.6.0-preview.19112.2</SystemSecurityPermissionsPackageVersion>
-    <SystemSecurityPrincipalWindowsPackageVersion>4.6.0-preview.19112.2</SystemSecurityPrincipalWindowsPackageVersion>
-    <SystemWindowsExtensionsPackageVersion>4.6.0-preview.19112.2</SystemWindowsExtensionsPackageVersion>
-    <SystemCodeDomPackageVersion>4.6.0-preview.19112.2</SystemCodeDomPackageVersion>
+    <MicrosoftWin32RegistryPackageVersion>4.6.0-preview.19112.21</MicrosoftWin32RegistryPackageVersion>
+    <SystemConfigurationConfigurationManagerPackageVersion>4.6.0-preview.19112.21</SystemConfigurationConfigurationManagerPackageVersion>
+    <SystemDiagnosticsEventLogPackageVersion>4.6.0-preview.19112.21</SystemDiagnosticsEventLogPackageVersion>
+    <SystemReflectionEmitPackageVersion>4.6.0-preview.19112.21</SystemReflectionEmitPackageVersion>
+    <SystemReflectionTypeExtensionsPackageVersion>4.6.0-preview.19112.21</SystemReflectionTypeExtensionsPackageVersion>
+    <SystemSecurityAccessControlPackageVersion>4.6.0-preview.19112.21</SystemSecurityAccessControlPackageVersion>
+    <SystemSecurityCryptographyXmlPackageVersion>4.6.0-preview.19112.21</SystemSecurityCryptographyXmlPackageVersion>
+    <SystemSecurityPermissionsPackageVersion>4.6.0-preview.19112.21</SystemSecurityPermissionsPackageVersion>
+    <SystemSecurityPrincipalWindowsPackageVersion>4.6.0-preview.19112.21</SystemSecurityPrincipalWindowsPackageVersion>
+    <SystemWindowsExtensionsPackageVersion>4.6.0-preview.19112.21</SystemWindowsExtensionsPackageVersion>
+    <SystemCodeDomPackageVersion>4.6.0-preview.19112.21</SystemCodeDomPackageVersion>
     <!-- Packages that come from https://github.com/dotnet/corefxlab -->
     <SystemReflectionTypeLoaderPackageVersion>0.1.0-preview2-181205-2</SystemReflectionTypeLoaderPackageVersion>
     <!-- Maintain System.CodeDom PackageVersion at 4.4.0. See https://github.com/Microsoft/msbuild/issues/3627 -->