diff --git a/build/dependencies.props b/build/dependencies.props
index af4ffa34d8..70fca66cbf 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -3,41 +3,41 @@
     <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
   </PropertyGroup>
   <PropertyGroup Label="Package Versions">
-    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview2-15728</InternalAspNetCoreSdkPackageVersion>
-    <InternalAspNetCoreSiteExtensionSdkPackageVersion>2.1.0-preview2-15728</InternalAspNetCoreSiteExtensionSdkPackageVersion>
+    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview3-17001</InternalAspNetCoreSdkPackageVersion>
+    <InternalAspNetCoreSiteExtensionSdkPackageVersion>2.1.0-preview3-17001</InternalAspNetCoreSiteExtensionSdkPackageVersion>
     <MicrosoftApplicationInsightsAspNetCorePackageVersion>2.1.1</MicrosoftApplicationInsightsAspNetCorePackageVersion>
-    <MicrosoftAspNetCoreAspNetCoreModulePackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreAspNetCoreModulePackageVersion>
-    <MicrosoftAspNetCoreAzureAppServicesHostingStartupPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreAzureAppServicesHostingStartupPackageVersion>
+    <MicrosoftAspNetCoreAspNetCoreModulePackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreAspNetCoreModulePackageVersion>
+    <MicrosoftAspNetCoreAzureAppServicesHostingStartupPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreAzureAppServicesHostingStartupPackageVersion>
     <MicrosoftAspNetCoreAzureKeyVaultHostingStartupPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreAzureKeyVaultHostingStartupPackageVersion>
-    <MicrosoftAspNetCoreDataProtectionAzureKeyVaultPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreDataProtectionAzureKeyVaultPackageVersion>
-    <MicrosoftAspNetCoreHostingAbstractionsPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreHostingAbstractionsPackageVersion>
-    <MicrosoftAspNetCoreHostingPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreHostingPackageVersion>
-    <MicrosoftAspNetCoreMvcPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreMvcPackageVersion>
-    <MicrosoftAspNetCoreRazorRuntimePackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreRazorRuntimePackageVersion>
-    <MicrosoftAspNetCoreServerIISIntegrationPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreServerIISIntegrationPackageVersion>
-    <MicrosoftAspNetCoreServerIntegrationTestingPackageVersion>0.5.0-preview2-30272</MicrosoftAspNetCoreServerIntegrationTestingPackageVersion>
-    <MicrosoftAspNetCoreServerKestrelPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreServerKestrelPackageVersion>
-    <MicrosoftAspNetCoreTestHostPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreTestHostPackageVersion>
+    <MicrosoftAspNetCoreDataProtectionAzureKeyVaultPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreDataProtectionAzureKeyVaultPackageVersion>
+    <MicrosoftAspNetCoreHostingAbstractionsPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreHostingAbstractionsPackageVersion>
+    <MicrosoftAspNetCoreHostingPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreHostingPackageVersion>
+    <MicrosoftAspNetCoreMvcPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreMvcPackageVersion>
+    <MicrosoftAspNetCoreRazorRuntimePackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreRazorRuntimePackageVersion>
+    <MicrosoftAspNetCoreServerIISIntegrationPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreServerIISIntegrationPackageVersion>
+    <MicrosoftAspNetCoreServerIntegrationTestingPackageVersion>0.5.0-preview2-32037</MicrosoftAspNetCoreServerIntegrationTestingPackageVersion>
+    <MicrosoftAspNetCoreServerKestrelPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreServerKestrelPackageVersion>
+    <MicrosoftAspNetCoreTestHostPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreTestHostPackageVersion>
     <MicrosoftAzureManagementFluentPackageVersion>1.1.3</MicrosoftAzureManagementFluentPackageVersion>
     <MicrosoftAzureServicesAppAuthenticationPackageVersion>1.1.0-preview</MicrosoftAzureServicesAppAuthenticationPackageVersion>
-    <MicrosoftExtensionsConfigurationAzureKeyVaultPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsConfigurationAzureKeyVaultPackageVersion>
-    <MicrosoftExtensionsConfigurationCommandLinePackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsConfigurationCommandLinePackageVersion>
-    <MicrosoftExtensionsConfigurationEnvironmentVariablesPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsConfigurationEnvironmentVariablesPackageVersion>
-    <MicrosoftExtensionsConfigurationJsonPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsConfigurationJsonPackageVersion>
-    <MicrosoftExtensionsDiagnosticAdapterPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsDiagnosticAdapterPackageVersion>
-    <MicrosoftExtensionsLoggingAzureAppServicesPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsLoggingAzureAppServicesPackageVersion>
-    <MicrosoftExtensionsLoggingConfigurationPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsLoggingConfigurationPackageVersion>
-    <MicrosoftExtensionsLoggingConsolePackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsLoggingConsolePackageVersion>
-    <MicrosoftExtensionsLoggingPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsLoggingPackageVersion>
-    <MicrosoftExtensionsLoggingTestingPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsLoggingTestingPackageVersion>
-    <MicrosoftExtensionsProcessSourcesPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsProcessSourcesPackageVersion>
+    <MicrosoftExtensionsConfigurationAzureKeyVaultPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsConfigurationAzureKeyVaultPackageVersion>
+    <MicrosoftExtensionsConfigurationCommandLinePackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsConfigurationCommandLinePackageVersion>
+    <MicrosoftExtensionsConfigurationEnvironmentVariablesPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsConfigurationEnvironmentVariablesPackageVersion>
+    <MicrosoftExtensionsConfigurationJsonPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsConfigurationJsonPackageVersion>
+    <MicrosoftExtensionsDiagnosticAdapterPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsDiagnosticAdapterPackageVersion>
+    <MicrosoftExtensionsLoggingAzureAppServicesPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsLoggingAzureAppServicesPackageVersion>
+    <MicrosoftExtensionsLoggingConfigurationPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsLoggingConfigurationPackageVersion>
+    <MicrosoftExtensionsLoggingConsolePackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsLoggingConsolePackageVersion>
+    <MicrosoftExtensionsLoggingPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsLoggingPackageVersion>
+    <MicrosoftExtensionsLoggingTestingPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsLoggingTestingPackageVersion>
+    <MicrosoftExtensionsProcessSourcesPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsProcessSourcesPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview2-26225-03</MicrosoftNETCoreApp21PackageVersion>
-    <MicrosoftNETTestSdkPackageVersion>15.6.0</MicrosoftNETTestSdkPackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview2-26314-02</MicrosoftNETCoreApp21PackageVersion>
+    <MicrosoftNETTestSdkPackageVersion>15.6.1</MicrosoftNETTestSdkPackageVersion>
     <MicrosoftWebXdtPackageVersion>1.4.0</MicrosoftWebXdtPackageVersion>
     <MoqPackageVersion>4.7.49</MoqPackageVersion>
-    <NewtonsoftJsonPackageVersion>10.0.1</NewtonsoftJsonPackageVersion>
-    <SystemReflectionMetadataPackageVersion>1.6.0-preview2-26224-02</SystemReflectionMetadataPackageVersion>
+    <NewtonsoftJsonPackageVersion>11.0.1</NewtonsoftJsonPackageVersion>
+    <SystemReflectionMetadataPackageVersion>1.6.0-preview2-26313-01</SystemReflectionMetadataPackageVersion>
     <WindowsAzureStoragePackageVersion>8.1.4</WindowsAzureStoragePackageVersion>
     <XunitPackageVersion>2.3.1</XunitPackageVersion>
     <XunitRunnerVisualStudioPackageVersion>2.4.0-beta.1.build3945</XunitRunnerVisualStudioPackageVersion>
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index 138d848db1..3a326c7d58 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.0-preview2-15728
-commithash:393377068ddcf51dfee0536536d455f57a828b06
+version:2.1.0-preview3-17001
+commithash:dda68c56abf0d3b911fe6a2315872c446b314585