diff --git a/build/dependencies.props b/build/dependencies.props
index 2028f3597a..b9fa7be535 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -3,38 +3,38 @@
     <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
   </PropertyGroup>
   <PropertyGroup Label="Package Versions">
-    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview2-15707</InternalAspNetCoreSdkPackageVersion>
-    <MicrosoftAspNetCoreAllPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreAllPackageVersion>
-    <MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>
-    <MicrosoftAspNetCoreAuthenticationJwtBearerPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreAuthenticationJwtBearerPackageVersion>
-    <MicrosoftAspNetCoreAuthenticationOpenIdConnectPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreAuthenticationOpenIdConnectPackageVersion>
-    <MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>
-    <MicrosoftAspNetCoreCookiePolicyPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreCookiePolicyPackageVersion>
-    <MicrosoftAspNetCoreDiagnosticsEntityFrameworkCorePackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreDiagnosticsEntityFrameworkCorePackageVersion>
-    <MicrosoftAspNetCoreHttpsPolicyPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreHttpsPolicyPackageVersion>
-    <MicrosoftAspNetCoreIdentityEntityFrameworkCorePackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreIdentityEntityFrameworkCorePackageVersion>
-    <MicrosoftAspNetCoreIdentityUIPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreIdentityUIPackageVersion>
-    <MicrosoftAspNetCoreMvcPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreMvcPackageVersion>
-    <MicrosoftAspNetCoreMvcRazorViewCompilationPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreMvcRazorViewCompilationPackageVersion>
-    <MicrosoftAspNetCorePackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCorePackageVersion>
-    <MicrosoftAspNetCoreSpaServicesExtensionsPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreSpaServicesExtensionsPackageVersion>
-    <MicrosoftAspNetCoreSpaServicesPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreSpaServicesPackageVersion>
-    <MicrosoftAspNetCoreStaticFilesPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreStaticFilesPackageVersion>
-    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview2-30131</MicrosoftAspNetCoreTestingPackageVersion>
+    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview2-15721</InternalAspNetCoreSdkPackageVersion>
+    <MicrosoftAspNetCoreAllPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreAllPackageVersion>
+    <MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>
+    <MicrosoftAspNetCoreAuthenticationJwtBearerPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreAuthenticationJwtBearerPackageVersion>
+    <MicrosoftAspNetCoreAuthenticationOpenIdConnectPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreAuthenticationOpenIdConnectPackageVersion>
+    <MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>
+    <MicrosoftAspNetCoreCookiePolicyPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreCookiePolicyPackageVersion>
+    <MicrosoftAspNetCoreDiagnosticsEntityFrameworkCorePackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreDiagnosticsEntityFrameworkCorePackageVersion>
+    <MicrosoftAspNetCoreHttpsPolicyPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreHttpsPolicyPackageVersion>
+    <MicrosoftAspNetCoreIdentityEntityFrameworkCorePackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreIdentityEntityFrameworkCorePackageVersion>
+    <MicrosoftAspNetCoreIdentityUIPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreIdentityUIPackageVersion>
+    <MicrosoftAspNetCoreMvcPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreMvcPackageVersion>
+    <MicrosoftAspNetCoreMvcRazorViewCompilationPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreMvcRazorViewCompilationPackageVersion>
+    <MicrosoftAspNetCorePackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCorePackageVersion>
+    <MicrosoftAspNetCoreSpaServicesExtensionsPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreSpaServicesExtensionsPackageVersion>
+    <MicrosoftAspNetCoreSpaServicesPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreSpaServicesPackageVersion>
+    <MicrosoftAspNetCoreStaticFilesPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreStaticFilesPackageVersion>
+    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview2-30187</MicrosoftAspNetCoreTestingPackageVersion>
     <MicrosoftBuildFrameworkPackageVersion>15.7.0-preview-000011-1378327</MicrosoftBuildFrameworkPackageVersion>
     <MicrosoftBuildUtilitiesCorePackageVersion>15.7.0-preview-000011-1378327</MicrosoftBuildUtilitiesCorePackageVersion>
-    <MicrosoftEntityFrameworkCoreDesignPackageVersion>2.1.0-preview2-30131</MicrosoftEntityFrameworkCoreDesignPackageVersion>
-    <MicrosoftEntityFrameworkCoreSqlitePackageVersion>2.1.0-preview2-30131</MicrosoftEntityFrameworkCoreSqlitePackageVersion>
-    <MicrosoftEntityFrameworkCoreSqlServerPackageVersion>2.1.0-preview2-30131</MicrosoftEntityFrameworkCoreSqlServerPackageVersion>
-    <MicrosoftEntityFrameworkCoreToolsDotNetPackageVersion>2.1.0-preview2-30131</MicrosoftEntityFrameworkCoreToolsDotNetPackageVersion>
-    <MicrosoftEntityFrameworkCoreToolsPackageVersion>2.1.0-preview2-30131</MicrosoftEntityFrameworkCoreToolsPackageVersion>
-    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.1.0-preview2-30131</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
-    <MicrosoftExtensionsProcessSourcesPackageVersion>2.1.0-preview2-30131</MicrosoftExtensionsProcessSourcesPackageVersion>
+    <MicrosoftEntityFrameworkCoreDesignPackageVersion>2.1.0-preview2-30187</MicrosoftEntityFrameworkCoreDesignPackageVersion>
+    <MicrosoftEntityFrameworkCoreSqlitePackageVersion>2.1.0-preview2-30187</MicrosoftEntityFrameworkCoreSqlitePackageVersion>
+    <MicrosoftEntityFrameworkCoreSqlServerPackageVersion>2.1.0-preview2-30187</MicrosoftEntityFrameworkCoreSqlServerPackageVersion>
+    <MicrosoftEntityFrameworkCoreToolsDotNetPackageVersion>2.1.0-preview2-30187</MicrosoftEntityFrameworkCoreToolsDotNetPackageVersion>
+    <MicrosoftEntityFrameworkCoreToolsPackageVersion>2.1.0-preview2-30187</MicrosoftEntityFrameworkCoreToolsPackageVersion>
+    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.1.0-preview2-30187</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
+    <MicrosoftExtensionsProcessSourcesPackageVersion>2.1.0-preview2-30187</MicrosoftExtensionsProcessSourcesPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
     <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview2-26130-04</MicrosoftNETCoreApp21PackageVersion>
-    <MicrosoftNETTestSdkPackageVersion>15.3.0</MicrosoftNETTestSdkPackageVersion>
-    <MicrosoftVisualStudioWebBrowserLinkPackageVersion>2.1.0-preview2-30131</MicrosoftVisualStudioWebBrowserLinkPackageVersion>
-    <MicrosoftVisualStudioWebCodeGenerationDesignPackageVersion>2.1.0-preview2-30131</MicrosoftVisualStudioWebCodeGenerationDesignPackageVersion>
+    <MicrosoftNETTestSdkPackageVersion>15.6.0</MicrosoftNETTestSdkPackageVersion>
+    <MicrosoftVisualStudioWebBrowserLinkPackageVersion>2.1.0-preview2-30187</MicrosoftVisualStudioWebBrowserLinkPackageVersion>
+    <MicrosoftVisualStudioWebCodeGenerationDesignPackageVersion>2.1.0-preview2-30187</MicrosoftVisualStudioWebCodeGenerationDesignPackageVersion>
     <MicrosoftVisualStudioWebCodeGenerationToolsPackageVersion>2.1.0-preview2-30131</MicrosoftVisualStudioWebCodeGenerationToolsPackageVersion>
     <SeleniumFirefoxWebDriverPackageVersion>0.19.0</SeleniumFirefoxWebDriverPackageVersion>
     <SeleniumSupportPackageVersion>3.7.0</SeleniumSupportPackageVersion>
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index 538f6228c3..563446a93f 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.0-preview2-15707
-commithash:e74e53f129ab34332947fea7ac7b7591b027cb22
+version:2.1.0-preview2-15721
+commithash:f9bb4be59e39938ec59a6975257e26099b0d03c1