diff --git a/build/dependencies.props b/build/dependencies.props
index 8838a65685..69288eedb1 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -3,29 +3,29 @@
     <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
   </PropertyGroup>
   <PropertyGroup Label="Package Versions">
-    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview2-15728</InternalAspNetCoreSdkPackageVersion>
-    <MicrosoftAspNetCoreHostingAbstractionsPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreHostingAbstractionsPackageVersion>
-    <MicrosoftAspNetCoreHostingPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreHostingPackageVersion>
-    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview2-30272</MicrosoftAspNetCoreTestingPackageVersion>
+    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview3-17001</InternalAspNetCoreSdkPackageVersion>
+    <MicrosoftAspNetCoreHostingAbstractionsPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreHostingAbstractionsPackageVersion>
+    <MicrosoftAspNetCoreHostingPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreHostingPackageVersion>
+    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview3-32037</MicrosoftAspNetCoreTestingPackageVersion>
     <MicrosoftAzureKeyVaultPackageVersion>2.3.2</MicrosoftAzureKeyVaultPackageVersion>
-    <MicrosoftExtensionsConfigurationJsonPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsConfigurationJsonPackageVersion>
-    <MicrosoftExtensionsConfigurationPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsConfigurationPackageVersion>
-    <MicrosoftExtensionsDependencyInjectionAbstractionsPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsDependencyInjectionAbstractionsPackageVersion>
-    <MicrosoftExtensionsDependencyInjectionPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsDependencyInjectionPackageVersion>
-    <MicrosoftExtensionsLoggingAbstractionsPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsLoggingAbstractionsPackageVersion>
-    <MicrosoftExtensionsLoggingConsolePackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsLoggingConsolePackageVersion>
-    <MicrosoftExtensionsLoggingPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsLoggingPackageVersion>
-    <MicrosoftExtensionsOptionsPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsOptionsPackageVersion>
-    <MicrosoftExtensionsWebEncodersSourcesPackageVersion>2.1.0-preview2-30272</MicrosoftExtensionsWebEncodersSourcesPackageVersion>
+    <MicrosoftExtensionsConfigurationJsonPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsConfigurationJsonPackageVersion>
+    <MicrosoftExtensionsConfigurationPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsConfigurationPackageVersion>
+    <MicrosoftExtensionsDependencyInjectionAbstractionsPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsDependencyInjectionAbstractionsPackageVersion>
+    <MicrosoftExtensionsDependencyInjectionPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsDependencyInjectionPackageVersion>
+    <MicrosoftExtensionsLoggingAbstractionsPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsLoggingAbstractionsPackageVersion>
+    <MicrosoftExtensionsLoggingConsolePackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsLoggingConsolePackageVersion>
+    <MicrosoftExtensionsLoggingPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsLoggingPackageVersion>
+    <MicrosoftExtensionsOptionsPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsOptionsPackageVersion>
+    <MicrosoftExtensionsWebEncodersSourcesPackageVersion>2.1.0-preview3-32037</MicrosoftExtensionsWebEncodersSourcesPackageVersion>
     <MicrosoftIdentityModelClientsActiveDirectoryPackageVersion>3.14.2</MicrosoftIdentityModelClientsActiveDirectoryPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview2-26225-03</MicrosoftNETCoreApp21PackageVersion>
-    <MicrosoftNETTestSdkPackageVersion>15.6.0</MicrosoftNETTestSdkPackageVersion>
-    <MicrosoftWin32RegistryPackageVersion>4.5.0-preview2-26224-02</MicrosoftWin32RegistryPackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview2-26314-02</MicrosoftNETCoreApp21PackageVersion>
+    <MicrosoftNETTestSdkPackageVersion>15.6.1</MicrosoftNETTestSdkPackageVersion>
+    <MicrosoftWin32RegistryPackageVersion>4.5.0-preview2-26313-01</MicrosoftWin32RegistryPackageVersion>
     <MoqPackageVersion>4.7.49</MoqPackageVersion>
     <StackExchangeRedisStrongNamePackageVersion>1.2.4</StackExchangeRedisStrongNamePackageVersion>
-    <SystemSecurityCryptographyXmlPackageVersion>4.5.0-preview2-26224-02</SystemSecurityCryptographyXmlPackageVersion>
-    <SystemSecurityPrincipalWindowsPackageVersion>4.5.0-preview2-26224-02</SystemSecurityPrincipalWindowsPackageVersion>
+    <SystemSecurityCryptographyXmlPackageVersion>4.5.0-preview2-26313-01</SystemSecurityCryptographyXmlPackageVersion>
+    <SystemSecurityPrincipalWindowsPackageVersion>4.5.0-preview2-26313-01</SystemSecurityPrincipalWindowsPackageVersion>
     <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 5ace9326ce..50ba1b5737 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