diff --git a/build/dependencies.props b/build/dependencies.props
index 8694ef4ec2..59617256ac 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -4,21 +4,21 @@
   </PropertyGroup>
   <PropertyGroup Label="Package Versions">
     <BenchmarkDotNetPackageVersion>0.10.11</BenchmarkDotNetPackageVersion>
-    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview1-15651</InternalAspNetCoreSdkPackageVersion>
-    <MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>2.1.0-preview1-27965</MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>
-    <MicrosoftAspNetCoreHtmlAbstractionsPackageVersion>2.1.0-preview1-27965</MicrosoftAspNetCoreHtmlAbstractionsPackageVersion>
-    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview1-27965</MicrosoftAspNetCoreTestingPackageVersion>
+    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview1-15669</InternalAspNetCoreSdkPackageVersion>
+    <MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>2.1.0-preview1-28069</MicrosoftAspNetCoreBenchmarkRunnerSourcesPackageVersion>
+    <MicrosoftAspNetCoreHtmlAbstractionsPackageVersion>2.1.0-preview1-28069</MicrosoftAspNetCoreHtmlAbstractionsPackageVersion>
+    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview1-28069</MicrosoftAspNetCoreTestingPackageVersion>
     <MicrosoftBuildFrameworkPackageVersion>15.3.409</MicrosoftBuildFrameworkPackageVersion>
     <MicrosoftBuildUtilitiesCorePackageVersion>15.3.409</MicrosoftBuildUtilitiesCorePackageVersion>
     <MicrosoftCodeAnalysisCommonPackageVersion>2.3.1</MicrosoftCodeAnalysisCommonPackageVersion>
     <MicrosoftCodeAnalysisCSharpPackageVersion>2.3.1</MicrosoftCodeAnalysisCSharpPackageVersion>
-    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.1.0-preview1-27965</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
-    <MicrosoftExtensionsCopyOnWriteDictionarySourcesPackageVersion>2.1.0-preview1-27965</MicrosoftExtensionsCopyOnWriteDictionarySourcesPackageVersion>
+    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.1.0-preview1-28069</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
+    <MicrosoftExtensionsCopyOnWriteDictionarySourcesPackageVersion>2.1.0-preview1-28069</MicrosoftExtensionsCopyOnWriteDictionarySourcesPackageVersion>
     <MicrosoftExtensionsDependencyModelPackageVersion>2.1.0-preview2-25711-01</MicrosoftExtensionsDependencyModelPackageVersion>
-    <MicrosoftExtensionsHashCodeCombinerSourcesPackageVersion>2.1.0-preview1-27965</MicrosoftExtensionsHashCodeCombinerSourcesPackageVersion>
-    <MicrosoftExtensionsWebEncodersPackageVersion>2.1.0-preview1-27965</MicrosoftExtensionsWebEncodersPackageVersion>
+    <MicrosoftExtensionsHashCodeCombinerSourcesPackageVersion>2.1.0-preview1-28069</MicrosoftExtensionsHashCodeCombinerSourcesPackageVersion>
+    <MicrosoftExtensionsWebEncodersPackageVersion>2.1.0-preview1-28069</MicrosoftExtensionsWebEncodersPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-26016-05</MicrosoftNETCoreApp21PackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview1-26102-01</MicrosoftNETCoreApp21PackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.3.0</MicrosoftNETTestSdkPackageVersion>
     <MicrosoftVisualStudioComponentModelHostPackageVersion>15.0.26606</MicrosoftVisualStudioComponentModelHostPackageVersion>
     <MicrosoftVisualStudioEditorPackageVersion>15.6.161-preview</MicrosoftVisualStudioEditorPackageVersion>
@@ -38,8 +38,8 @@
     <NETStandard20PackageVersion>2.0.0</NETStandard20PackageVersion>
     <NewtonsoftJsonPackageVersion>10.0.1</NewtonsoftJsonPackageVersion>
     <StreamJsonRpcPackageVersion>1.1.92</StreamJsonRpcPackageVersion>
-    <SystemDiagnosticsDiagnosticSourcePackageVersion>4.5.0-preview1-26016-05</SystemDiagnosticsDiagnosticSourcePackageVersion>
-    <SystemValueTuplePackageVersion>4.5.0-preview1-26016-05</SystemValueTuplePackageVersion>
+    <SystemDiagnosticsDiagnosticSourcePackageVersion>4.5.0-preview1-26102-01</SystemDiagnosticsDiagnosticSourcePackageVersion>
+    <SystemValueTuplePackageVersion>4.5.0-preview1-26102-01</SystemValueTuplePackageVersion>
     <VisualStudio_NewtonsoftJsonPackageVersion>9.0.1</VisualStudio_NewtonsoftJsonPackageVersion>
     <VSIX_MicrosoftCodeAnalysisCommonPackageVersion>2.6.0-beta1-62023-02</VSIX_MicrosoftCodeAnalysisCommonPackageVersion>
     <VSIX_MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>2.6.0-beta1-62023-02</VSIX_MicrosoftCodeAnalysisCSharpFeaturesPackageVersion>
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index 7c2e97aa79..9dd77da5ad 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.0-preview1-15651
-commithash:ebf2365121c2c6a6a0fbfa9b0f37bb5effc89323
+version:2.1.0-preview1-15669
+commithash:71f5ddb314a8b6201b248a5729f4ab5c83f46b18
diff --git a/test/testapps/AppWithP2PReference/AppWithP2PReference.csproj b/test/testapps/AppWithP2PReference/AppWithP2PReference.csproj
index 5238c1ca01..e2d48c63e2 100644
--- a/test/testapps/AppWithP2PReference/AppWithP2PReference.csproj
+++ b/test/testapps/AppWithP2PReference/AppWithP2PReference.csproj
@@ -14,7 +14,6 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(BinariesRoot)'!=''">
-    <Reference Include="$(BinariesRoot)\System.Diagnostics.DiagnosticSource.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Html.Abstractions.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Razor.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Razor.Runtime.dll"/>
diff --git a/test/testapps/ClassLibrary/ClassLibrary.csproj b/test/testapps/ClassLibrary/ClassLibrary.csproj
index 757b8fd9b1..55162547b1 100644
--- a/test/testapps/ClassLibrary/ClassLibrary.csproj
+++ b/test/testapps/ClassLibrary/ClassLibrary.csproj
@@ -16,7 +16,6 @@
   </ItemGroup>
   
   <ItemGroup Condition="'$(BinariesRoot)'!=''">
-    <Reference Include="$(BinariesRoot)\System.Diagnostics.DiagnosticSource.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Html.Abstractions.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Razor.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Razor.Runtime.dll"/>
diff --git a/test/testapps/SimpleMvc/SimpleMvc.csproj b/test/testapps/SimpleMvc/SimpleMvc.csproj
index f2a93d60cb..d09da0df29 100644
--- a/test/testapps/SimpleMvc/SimpleMvc.csproj
+++ b/test/testapps/SimpleMvc/SimpleMvc.csproj
@@ -10,7 +10,6 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(BinariesRoot)'!=''">
-    <Reference Include="$(BinariesRoot)\System.Diagnostics.DiagnosticSource.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Html.Abstractions.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Razor.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Razor.Runtime.dll"/>
diff --git a/test/testapps/SimplePages/SimplePages.csproj b/test/testapps/SimplePages/SimplePages.csproj
index f2a93d60cb..d09da0df29 100644
--- a/test/testapps/SimplePages/SimplePages.csproj
+++ b/test/testapps/SimplePages/SimplePages.csproj
@@ -10,7 +10,6 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(BinariesRoot)'!=''">
-    <Reference Include="$(BinariesRoot)\System.Diagnostics.DiagnosticSource.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Html.Abstractions.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Razor.dll"/>
     <Reference Include="$(BinariesRoot)\Microsoft.AspNetCore.Razor.Runtime.dll"/>