diff --git a/build/dependencies.props b/build/dependencies.props
index fa81953f1c..fe712915df 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -4,23 +4,23 @@
   </PropertyGroup>
   <PropertyGroup Label="Package Versions">
     <BenchmarkDotNetPackageVersion>0.10.13</BenchmarkDotNetPackageVersion>
-    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview2-15744</InternalAspNetCoreSdkPackageVersion>
-    <MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>
-    <MicrosoftAspNetCoreHtmlAbstractionsPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreHtmlAbstractionsPackageVersion>
-    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview2-30355</MicrosoftAspNetCoreTestingPackageVersion>
+    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview2-15749</InternalAspNetCoreSdkPackageVersion>
+    <MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>
+    <MicrosoftAspNetCoreHtmlAbstractionsPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreHtmlAbstractionsPackageVersion>
+    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview2-30478</MicrosoftAspNetCoreTestingPackageVersion>
     <MicrosoftBuildFrameworkPackageVersion>15.6.82</MicrosoftBuildFrameworkPackageVersion>
     <MicrosoftBuildPackageVersion>15.6.82</MicrosoftBuildPackageVersion>
     <MicrosoftBuildUtilitiesCorePackageVersion>15.6.82</MicrosoftBuildUtilitiesCorePackageVersion>
     <MicrosoftCodeAnalysisCommonPackageVersion>2.6.1</MicrosoftCodeAnalysisCommonPackageVersion>
     <MicrosoftCodeAnalysisCSharpPackageVersion>2.6.1</MicrosoftCodeAnalysisCSharpPackageVersion>
-    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
-    <MicrosoftExtensionsCopyOnWriteDictionarySourcesPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsCopyOnWriteDictionarySourcesPackageVersion>
-    <MicrosoftExtensionsDependencyModelPackageVersion>2.1.0-preview2-26313-01</MicrosoftExtensionsDependencyModelPackageVersion>
-    <MicrosoftExtensionsHashCodeCombinerSourcesPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsHashCodeCombinerSourcesPackageVersion>
-    <MicrosoftExtensionsWebEncodersPackageVersion>2.1.0-preview2-30355</MicrosoftExtensionsWebEncodersPackageVersion>
+    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
+    <MicrosoftExtensionsCopyOnWriteDictionarySourcesPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsCopyOnWriteDictionarySourcesPackageVersion>
+    <MicrosoftExtensionsDependencyModelPackageVersion>2.1.0-preview2-26326-03</MicrosoftExtensionsDependencyModelPackageVersion>
+    <MicrosoftExtensionsHashCodeCombinerSourcesPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsHashCodeCombinerSourcesPackageVersion>
+    <MicrosoftExtensionsWebEncodersPackageVersion>2.1.0-preview2-30478</MicrosoftExtensionsWebEncodersPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview2-26314-02</MicrosoftNETCoreApp21PackageVersion>
-    <MicrosoftNETTestSdkPackageVersion>15.6.0</MicrosoftNETTestSdkPackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview2-26326-03</MicrosoftNETCoreApp21PackageVersion>
+    <MicrosoftNETTestSdkPackageVersion>15.6.1</MicrosoftNETTestSdkPackageVersion>
     <MicrosoftVisualStudioComponentModelHostPackageVersion>15.0.26606</MicrosoftVisualStudioComponentModelHostPackageVersion>
     <MicrosoftVisualStudioEditorPackageVersion>15.6.161-preview</MicrosoftVisualStudioEditorPackageVersion>
     <MicrosoftVisualStudioLanguageIntellisensePackageVersion>15.6.161-preview</MicrosoftVisualStudioLanguageIntellisensePackageVersion>
@@ -40,10 +40,10 @@
     <MonoDevelopSdkPackageVersion>1.0.1</MonoDevelopSdkPackageVersion>
     <MoqPackageVersion>4.7.49</MoqPackageVersion>
     <NETStandardLibrary20PackageVersion>2.0.1</NETStandardLibrary20PackageVersion>
-    <NewtonsoftJsonPackageVersion>10.0.1</NewtonsoftJsonPackageVersion>
+    <NewtonsoftJsonPackageVersion>11.0.2</NewtonsoftJsonPackageVersion>
     <StreamJsonRpcPackageVersion>1.1.92</StreamJsonRpcPackageVersion>
-    <SystemDiagnosticsDiagnosticSourcePackageVersion>4.5.0-preview2-26313-01</SystemDiagnosticsDiagnosticSourcePackageVersion>
-    <SystemValueTuplePackageVersion>4.5.0-preview2-26313-01</SystemValueTuplePackageVersion>
+    <SystemDiagnosticsDiagnosticSourcePackageVersion>4.5.0-preview2-26326-04</SystemDiagnosticsDiagnosticSourcePackageVersion>
+    <SystemValueTuplePackageVersion>4.5.0-preview2-26326-04</SystemValueTuplePackageVersion>
     <VisualStudio_NewtonsoftJsonPackageVersion>9.0.1</VisualStudio_NewtonsoftJsonPackageVersion>
     <VSIX_MicrosoftCodeAnalysisCommonPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisCommonPackageVersion>
     <VSIX_MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>2.7.0-beta3-62512-06</VSIX_MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index 2e536eb8b8..76d2c851ca 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.0-preview2-15744
-commithash:9e15cb6062ab5b9790d3fa699e018543a6950713
+version:2.1.0-preview2-15749
+commithash:5544c9ab20fa5e24b9e155d8958a3c3b6f5f9df9