diff --git a/build/dependencies.props b/build/dependencies.props
index 23b78ba2aa..d2543bc009 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -3,28 +3,28 @@
     <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
   </PropertyGroup>
   <PropertyGroup Label="Package Versions">
-    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview1-15576</InternalAspNetCoreSdkPackageVersion>
-    <MicrosoftAspNetCoreHttpExtensionsPackageVersion>2.1.0-preview1-27644</MicrosoftAspNetCoreHttpExtensionsPackageVersion>
-    <MicrosoftAspNetCoreRoutingAbstractionsPackageVersion>2.1.0-preview1-27644</MicrosoftAspNetCoreRoutingAbstractionsPackageVersion>
-    <MicrosoftAspNetCoreRoutingPackageVersion>2.1.0-preview1-27644</MicrosoftAspNetCoreRoutingPackageVersion>
-    <MicrosoftAspNetCoreServerIISIntegrationPackageVersion>2.1.0-preview1-27644</MicrosoftAspNetCoreServerIISIntegrationPackageVersion>
-    <MicrosoftAspNetCoreServerKestrelPackageVersion>2.1.0-preview1-27644</MicrosoftAspNetCoreServerKestrelPackageVersion>
-    <MicrosoftAspNetCoreTestHostPackageVersion>2.1.0-preview1-27644</MicrosoftAspNetCoreTestHostPackageVersion>
-    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview1-27644</MicrosoftAspNetCoreTestingPackageVersion>
-    <MicrosoftExtensionsConfigurationCommandLinePackageVersion>2.1.0-preview1-27644</MicrosoftExtensionsConfigurationCommandLinePackageVersion>
-    <MicrosoftExtensionsDependencyInjectionAbstractionsPackageVersion>2.1.0-preview1-27644</MicrosoftExtensionsDependencyInjectionAbstractionsPackageVersion>
-    <MicrosoftExtensionsDependencyInjectionPackageVersion>2.1.0-preview1-27644</MicrosoftExtensionsDependencyInjectionPackageVersion>
-    <MicrosoftExtensionsLoggingAbstractionsPackageVersion>2.1.0-preview1-27644</MicrosoftExtensionsLoggingAbstractionsPackageVersion>
-    <MicrosoftExtensionsLoggingConsolePackageVersion>2.1.0-preview1-27644</MicrosoftExtensionsLoggingConsolePackageVersion>
-    <MicrosoftExtensionsLoggingPackageVersion>2.1.0-preview1-27644</MicrosoftExtensionsLoggingPackageVersion>
-    <MicrosoftExtensionsLoggingTestingPackageVersion>2.1.0-preview1-27644</MicrosoftExtensionsLoggingTestingPackageVersion>
-    <MicrosoftExtensionsOptionsPackageVersion>2.1.0-preview1-27644</MicrosoftExtensionsOptionsPackageVersion>
+    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview1-15618</InternalAspNetCoreSdkPackageVersion>
+    <MicrosoftAspNetCoreHttpExtensionsPackageVersion>2.1.0-preview1-27773</MicrosoftAspNetCoreHttpExtensionsPackageVersion>
+    <MicrosoftAspNetCoreRoutingAbstractionsPackageVersion>2.1.0-preview1-27773</MicrosoftAspNetCoreRoutingAbstractionsPackageVersion>
+    <MicrosoftAspNetCoreRoutingPackageVersion>2.1.0-preview1-27773</MicrosoftAspNetCoreRoutingPackageVersion>
+    <MicrosoftAspNetCoreServerIISIntegrationPackageVersion>2.1.0-preview1-27773</MicrosoftAspNetCoreServerIISIntegrationPackageVersion>
+    <MicrosoftAspNetCoreServerKestrelPackageVersion>2.1.0-preview1-27773</MicrosoftAspNetCoreServerKestrelPackageVersion>
+    <MicrosoftAspNetCoreTestHostPackageVersion>2.1.0-preview1-27773</MicrosoftAspNetCoreTestHostPackageVersion>
+    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview1-27773</MicrosoftAspNetCoreTestingPackageVersion>
+    <MicrosoftExtensionsConfigurationCommandLinePackageVersion>2.1.0-preview1-27773</MicrosoftExtensionsConfigurationCommandLinePackageVersion>
+    <MicrosoftExtensionsDependencyInjectionAbstractionsPackageVersion>2.1.0-preview1-27773</MicrosoftExtensionsDependencyInjectionAbstractionsPackageVersion>
+    <MicrosoftExtensionsDependencyInjectionPackageVersion>2.1.0-preview1-27773</MicrosoftExtensionsDependencyInjectionPackageVersion>
+    <MicrosoftExtensionsLoggingAbstractionsPackageVersion>2.1.0-preview1-27773</MicrosoftExtensionsLoggingAbstractionsPackageVersion>
+    <MicrosoftExtensionsLoggingConsolePackageVersion>2.1.0-preview1-27773</MicrosoftExtensionsLoggingConsolePackageVersion>
+    <MicrosoftExtensionsLoggingPackageVersion>2.1.0-preview1-27773</MicrosoftExtensionsLoggingPackageVersion>
+    <MicrosoftExtensionsLoggingTestingPackageVersion>2.1.0-preview1-27773</MicrosoftExtensionsLoggingTestingPackageVersion>
+    <MicrosoftExtensionsOptionsPackageVersion>2.1.0-preview1-27773</MicrosoftExtensionsOptionsPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-25907-02</MicrosoftNETCoreApp21PackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-25915-01</MicrosoftNETCoreApp21PackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.3.0</MicrosoftNETTestSdkPackageVersion>
     <MoqPackageVersion>4.7.49</MoqPackageVersion>
-    <XunitPackageVersion>2.3.0</XunitPackageVersion>
-    <XunitRunnerVisualStudioPackageVersion>2.3.0</XunitRunnerVisualStudioPackageVersion>
+    <XunitPackageVersion>2.3.1</XunitPackageVersion>
+    <XunitRunnerVisualStudioPackageVersion>2.3.1</XunitRunnerVisualStudioPackageVersion>
   </PropertyGroup>
   <Import Project="$(DotNetPackageVersionPropsPath)" Condition=" '$(DotNetPackageVersionPropsPath)' != '' " />
 </Project>
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index 1a99066b7c..e7cce93009 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.0-preview1-15576
-commithash:2f3856d2ba4f659fcb9253215b83946a06794a27
+version:2.1.0-preview1-15618
+commithash:00ce1383114015fe89b221146036e59e6bc11219