diff --git a/build/dependencies.props b/build/dependencies.props
index 1c2af18e8a..26de2b0926 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -3,24 +3,24 @@
     <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
   </PropertyGroup>
   <PropertyGroup Label="Package Versions">
-    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview1-1010</InternalAspNetCoreSdkPackageVersion>
-    <MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>2.1.0-preview1-28193</MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>
-    <MicrosoftAspNetCoreHostingPackageVersion>2.1.0-preview1-28193</MicrosoftAspNetCoreHostingPackageVersion>
-    <MicrosoftAspNetCoreMvcPackageVersion>2.1.0-preview1-28193</MicrosoftAspNetCoreMvcPackageVersion>
-    <MicrosoftAspNetCoreMvcRazorPagesPackageVersion>2.1.0-preview1-28193</MicrosoftAspNetCoreMvcRazorPagesPackageVersion>
-    <MicrosoftAspNetCoreRazorDesignPackageVersion>2.1.0-preview1-28193</MicrosoftAspNetCoreRazorDesignPackageVersion>
-    <MicrosoftAspNetCoreRazorRuntimePackageVersion>2.1.0-preview1-28193</MicrosoftAspNetCoreRazorRuntimePackageVersion>
-    <MicrosoftAspNetCoreServerIntegrationTestingPackageVersion>0.5.0-preview1-28193</MicrosoftAspNetCoreServerIntegrationTestingPackageVersion>
-    <MicrosoftAspNetCoreServerKestrelPackageVersion>2.1.0-preview1-28193</MicrosoftAspNetCoreServerKestrelPackageVersion>
-    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview1-28193</MicrosoftAspNetCoreTestingPackageVersion>
-    <MicrosoftBuildTasksCorePackageVersion>15.3.409</MicrosoftBuildTasksCorePackageVersion>
-    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.1.0-preview1-28193</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
-    <MicrosoftExtensionsConfigurationCommandLinePackageVersion>2.1.0-preview1-28193</MicrosoftExtensionsConfigurationCommandLinePackageVersion>
-    <MicrosoftExtensionsLoggingConsolePackageVersion>2.1.0-preview1-28193</MicrosoftExtensionsLoggingConsolePackageVersion>
-    <MicrosoftExtensionsLoggingPackageVersion>2.1.0-preview1-28193</MicrosoftExtensionsLoggingPackageVersion>
-    <MicrosoftExtensionsLoggingTestingPackageVersion>2.1.0-preview1-28193</MicrosoftExtensionsLoggingTestingPackageVersion>
+    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview1-1027</InternalAspNetCoreSdkPackageVersion>
+    <MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>2.1.0-preview1-28274</MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>
+    <MicrosoftAspNetCoreHostingPackageVersion>2.1.0-preview1-28274</MicrosoftAspNetCoreHostingPackageVersion>
+    <MicrosoftAspNetCoreMvcPackageVersion>2.1.0-preview1-28274</MicrosoftAspNetCoreMvcPackageVersion>
+    <MicrosoftAspNetCoreMvcRazorPagesPackageVersion>2.1.0-preview1-28274</MicrosoftAspNetCoreMvcRazorPagesPackageVersion>
+    <MicrosoftAspNetCoreRazorDesignPackageVersion>2.1.0-preview1-28274</MicrosoftAspNetCoreRazorDesignPackageVersion>
+    <MicrosoftAspNetCoreRazorRuntimePackageVersion>2.1.0-preview1-28274</MicrosoftAspNetCoreRazorRuntimePackageVersion>
+    <MicrosoftAspNetCoreServerIntegrationTestingPackageVersion>0.5.0-preview1-28274</MicrosoftAspNetCoreServerIntegrationTestingPackageVersion>
+    <MicrosoftAspNetCoreServerKestrelPackageVersion>2.1.0-preview1-28274</MicrosoftAspNetCoreServerKestrelPackageVersion>
+    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview1-28274</MicrosoftAspNetCoreTestingPackageVersion>
+    <MicrosoftBuildTasksCorePackageVersion>15.7.0-preview-000010-1365343</MicrosoftBuildTasksCorePackageVersion>
+    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.1.0-preview1-28274</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
+    <MicrosoftExtensionsConfigurationCommandLinePackageVersion>2.1.0-preview1-28274</MicrosoftExtensionsConfigurationCommandLinePackageVersion>
+    <MicrosoftExtensionsLoggingConsolePackageVersion>2.1.0-preview1-28274</MicrosoftExtensionsLoggingConsolePackageVersion>
+    <MicrosoftExtensionsLoggingPackageVersion>2.1.0-preview1-28274</MicrosoftExtensionsLoggingPackageVersion>
+    <MicrosoftExtensionsLoggingTestingPackageVersion>2.1.0-preview1-28274</MicrosoftExtensionsLoggingTestingPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-26122-01</MicrosoftNETCoreApp21PackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-26208-06</MicrosoftNETCoreApp21PackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.3.0</MicrosoftNETTestSdkPackageVersion>
     <XunitPackageVersion>2.3.1</XunitPackageVersion>
     <XunitRunnerVisualStudioPackageVersion>2.3.1</XunitRunnerVisualStudioPackageVersion>
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index 851bfbf203..8e2a1d99b5 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.0-preview1-1010
-commithash:75ca924dfbd673c38841025b04c4dcd93b84f56d
+version:2.1.0-preview1-1027
+commithash:f5c4b3e1c519c8aea832672f2f42531912f7b9fb