diff --git a/build/dependencies.props b/build/dependencies.props
index ad44b59226..db44bbd005 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -5,41 +5,41 @@
   <!-- This files is typically managed by automation. Execute 'run.ps1 upgrade deps' to update these variables to the last-known-good versions. -->
   <PropertyGroup Label="Package Versions">
     <BenchmarkDotNetPackageVersion>0.10.13</BenchmarkDotNetPackageVersion>
-    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview2-15742</InternalAspNetCoreSdkPackageVersion>
+    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview2-15749</InternalAspNetCoreSdkPackageVersion>
     <LibuvPackageVersion>1.10.0</LibuvPackageVersion>
-    <MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>
-    <MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>
-    <MicrosoftAspNetCoreHostingAbstractionsPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreHostingAbstractionsPackageVersion>
-    <MicrosoftAspNetCoreHostingPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreHostingPackageVersion>
-    <MicrosoftAspNetCoreHttpAbstractionsPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreHttpAbstractionsPackageVersion>
-    <MicrosoftAspNetCoreHttpFeaturesPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreHttpFeaturesPackageVersion>
-    <MicrosoftAspNetCoreHttpPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreHttpPackageVersion>
-    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreTestingPackageVersion>
-    <MicrosoftAspNetCoreWebUtilitiesPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreWebUtilitiesPackageVersion>
-    <MicrosoftExtensionsActivatorUtilitiesSourcesPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsActivatorUtilitiesSourcesPackageVersion>
-    <MicrosoftExtensionsBuffersSourcesPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsBuffersSourcesPackageVersion>
-    <MicrosoftExtensionsBuffersTestingSourcesPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsBuffersTestingSourcesPackageVersion>
-    <MicrosoftExtensionsConfigurationBinderPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsConfigurationBinderPackageVersion>
-    <MicrosoftExtensionsConfigurationJsonPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsConfigurationJsonPackageVersion>
-    <MicrosoftExtensionsDependencyInjectionPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsDependencyInjectionPackageVersion>
-    <MicrosoftExtensionsLoggingAbstractionsPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsLoggingAbstractionsPackageVersion>
-    <MicrosoftExtensionsLoggingConsolePackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsLoggingConsolePackageVersion>
-    <MicrosoftExtensionsLoggingPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsLoggingPackageVersion>
-    <MicrosoftExtensionsLoggingTestingPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsLoggingTestingPackageVersion>
-    <MicrosoftExtensionsOptionsPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsOptionsPackageVersion>
+    <MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>
+    <MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>
+    <MicrosoftAspNetCoreHostingAbstractionsPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreHostingAbstractionsPackageVersion>
+    <MicrosoftAspNetCoreHostingPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreHostingPackageVersion>
+    <MicrosoftAspNetCoreHttpAbstractionsPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreHttpAbstractionsPackageVersion>
+    <MicrosoftAspNetCoreHttpFeaturesPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreHttpFeaturesPackageVersion>
+    <MicrosoftAspNetCoreHttpPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreHttpPackageVersion>
+    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreTestingPackageVersion>
+    <MicrosoftAspNetCoreWebUtilitiesPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreWebUtilitiesPackageVersion>
+    <MicrosoftExtensionsActivatorUtilitiesSourcesPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsActivatorUtilitiesSourcesPackageVersion>
+    <MicrosoftExtensionsBuffersSourcesPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsBuffersSourcesPackageVersion>
+    <MicrosoftExtensionsBuffersTestingSourcesPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsBuffersTestingSourcesPackageVersion>
+    <MicrosoftExtensionsConfigurationBinderPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsConfigurationBinderPackageVersion>
+    <MicrosoftExtensionsConfigurationJsonPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsConfigurationJsonPackageVersion>
+    <MicrosoftExtensionsDependencyInjectionPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsDependencyInjectionPackageVersion>
+    <MicrosoftExtensionsLoggingAbstractionsPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsLoggingAbstractionsPackageVersion>
+    <MicrosoftExtensionsLoggingConsolePackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsLoggingConsolePackageVersion>
+    <MicrosoftExtensionsLoggingPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsLoggingPackageVersion>
+    <MicrosoftExtensionsLoggingTestingPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsLoggingTestingPackageVersion>
+    <MicrosoftExtensionsOptionsPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsOptionsPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview2-26314-02</MicrosoftNETCoreApp21PackageVersion>
-    <MicrosoftNetHttpHeadersPackageVersion>2.1.0-preview2-30355</MicrosoftNetHttpHeadersPackageVersion>
-    <MicrosoftNETTestSdkPackageVersion>15.6.0</MicrosoftNETTestSdkPackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview2-26326-03</MicrosoftNETCoreApp21PackageVersion>
+    <MicrosoftNetHttpHeadersPackageVersion>2.1.0-preview2-30478</MicrosoftNetHttpHeadersPackageVersion>
+    <MicrosoftNETTestSdkPackageVersion>15.6.1</MicrosoftNETTestSdkPackageVersion>
     <MoqPackageVersion>4.7.49</MoqPackageVersion>
-    <NewtonsoftJsonPackageVersion>10.0.1</NewtonsoftJsonPackageVersion>
-    <SystemBuffersPackageVersion>4.5.0-preview2-26313-01</SystemBuffersPackageVersion>
-    <SystemIOPipelinesPackageVersion>4.5.0-preview2-26313-01</SystemIOPipelinesPackageVersion>
-    <SystemMemoryPackageVersion>4.5.0-preview2-26313-01</SystemMemoryPackageVersion>
-    <SystemNumericsVectorsPackageVersion>4.5.0-preview2-26313-01</SystemNumericsVectorsPackageVersion>
-    <SystemRuntimeCompilerServicesUnsafePackageVersion>4.5.0-preview2-26313-01</SystemRuntimeCompilerServicesUnsafePackageVersion>
-    <SystemSecurityCryptographyCngPackageVersion>4.5.0-preview2-26313-01</SystemSecurityCryptographyCngPackageVersion>
-    <SystemThreadingTasksExtensionsPackageVersion>4.5.0-preview2-26313-01</SystemThreadingTasksExtensionsPackageVersion>
+    <NewtonsoftJsonPackageVersion>11.0.2</NewtonsoftJsonPackageVersion>
+    <SystemBuffersPackageVersion>4.5.0-preview2-26326-04</SystemBuffersPackageVersion>
+    <SystemIOPipelinesPackageVersion>4.5.0-preview2-26326-04</SystemIOPipelinesPackageVersion>
+    <SystemMemoryPackageVersion>4.5.0-preview2-26326-04</SystemMemoryPackageVersion>
+    <SystemNumericsVectorsPackageVersion>4.5.0-preview2-26326-04</SystemNumericsVectorsPackageVersion>
+    <SystemRuntimeCompilerServicesUnsafePackageVersion>4.5.0-preview2-26326-04</SystemRuntimeCompilerServicesUnsafePackageVersion>
+    <SystemSecurityCryptographyCngPackageVersion>4.5.0-preview2-26326-04</SystemSecurityCryptographyCngPackageVersion>
+    <SystemThreadingTasksExtensionsPackageVersion>4.5.0-preview2-26326-04</SystemThreadingTasksExtensionsPackageVersion>
     <XunitAnalyzersPackageVersion>0.8.0</XunitAnalyzersPackageVersion>
     <XunitPackageVersion>2.3.1</XunitPackageVersion>
     <XunitRunnerVisualStudioPackageVersion>2.4.0-beta.1.build3945</XunitRunnerVisualStudioPackageVersion>
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index e40ef6651b..b8e036fe2c 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.0-preview2-15742
-commithash:21fbb0f2c3fe4a9216e2d59632b98cfd7d685962
+version:2.1.0-preview2-15749
+commithash:5544c9ab20fa5e24b9e155d8958a3c3b6f5f9df9