diff --git a/Directory.Build.props b/Directory.Build.props
index 46a1159f78..3bb2bcbca8 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -16,6 +16,8 @@
     <SignAssembly>true</SignAssembly>
     <PublicSign Condition="'$(OS)' != 'Windows_NT'">true</PublicSign>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <!-- https://github.com/aspnet/IISIntegration/issues/617 -->
+    <EnableApiCheck>false</EnableApiCheck>
   </PropertyGroup>
 
 </Project>
diff --git a/build/dependencies.props b/build/dependencies.props
index 052ad83390..e3c052c3d9 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -13,13 +13,13 @@
     <MicrosoftAspNetCoreHttpPackageVersion>2.1.0-preview2-30500</MicrosoftAspNetCoreHttpPackageVersion>
     <MicrosoftAspNetCoreHttpSysSourcesPackageVersion>2.1.0-preview2-30500</MicrosoftAspNetCoreHttpSysSourcesPackageVersion>
     <MicrosoftAspNetCoreServerIntegrationTestingPackageVersion>0.5.0-preview2-30500</MicrosoftAspNetCoreServerIntegrationTestingPackageVersion>
-    <MicrosoftAspNetCoreServerKestrelPackageVersion>2.1.0-preview2-30500</MicrosoftAspNetCoreServerKestrelPackageVersion>
+    <MicrosoftAspNetCoreServerKestrelPackageVersion>2.1.0-a-preview2-mpr-17640</MicrosoftAspNetCoreServerKestrelPackageVersion>
     <MicrosoftAspNetCoreTestHostPackageVersion>2.1.0-preview2-30500</MicrosoftAspNetCoreTestHostPackageVersion>
     <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview2-30500</MicrosoftAspNetCoreTestingPackageVersion>
     <MicrosoftAspNetCoreWebUtilitiesPackageVersion>2.1.0-preview2-30500</MicrosoftAspNetCoreWebUtilitiesPackageVersion>
     <MicrosoftBuildFrameworkPackageVersion>15.6.82</MicrosoftBuildFrameworkPackageVersion>
     <MicrosoftBuildUtilitiesCorePackageVersion>15.6.82</MicrosoftBuildUtilitiesCorePackageVersion>
-    <MicrosoftExtensionsBuffersSourcesPackageVersion>2.1.0-preview2-t000</MicrosoftExtensionsBuffersSourcesPackageVersion>
+    <MicrosoftExtensionsBuffersSourcesPackageVersion>2.1.0-a-preview2-mpr-16444</MicrosoftExtensionsBuffersSourcesPackageVersion>
     <MicrosoftExtensionsConfigurationEnvironmentVariablesPackageVersion>2.1.0-preview2-30500</MicrosoftExtensionsConfigurationEnvironmentVariablesPackageVersion>
     <MicrosoftExtensionsConfigurationJsonPackageVersion>2.1.0-preview2-30500</MicrosoftExtensionsConfigurationJsonPackageVersion>
     <MicrosoftExtensionsLoggingAbstractionsPackageVersion>2.1.0-preview2-30500</MicrosoftExtensionsLoggingAbstractionsPackageVersion>
@@ -31,18 +31,18 @@
     <MicrosoftExtensionsPlatformAbstractionsPackageVersion>1.1.0</MicrosoftExtensionsPlatformAbstractionsPackageVersion>
     <MicrosoftExtensionsSecurityHelperSourcesPackageVersion>2.1.0-preview2-30500</MicrosoftExtensionsSecurityHelperSourcesPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview2-26326-03</MicrosoftNETCoreApp21PackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview3-26331-01</MicrosoftNETCoreApp21PackageVersion>
     <MicrosoftNetHttpHeadersPackageVersion>2.1.0-preview2-30500</MicrosoftNetHttpHeadersPackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.6.1</MicrosoftNETTestSdkPackageVersion>
     <MicrosoftWebAdministrationPackageVersion>7.0.0</MicrosoftWebAdministrationPackageVersion>
-    <SystemBuffersPackageVersion>4.5.0-preview3-26330-0</SystemBuffersPackageVersion>
-    <SystemIOPipelinesPackageVersion>4.5.0-preview3-26330-0</SystemIOPipelinesPackageVersion>
+    <SystemBuffersPackageVersion>4.5.0-preview3-26331-02</SystemBuffersPackageVersion>
+    <SystemIOPipelinesPackageVersion>4.5.0-preview3-26331-02</SystemIOPipelinesPackageVersion>
     <SystemManagementAutomationPackageVersion>6.1.7601.17515</SystemManagementAutomationPackageVersion>
-    <SystemMemoryPackageVersion>4.5.0-preview3-26330-0</SystemMemoryPackageVersion>
-    <SystemNetWebSocketsWebSocketProtocolPackageVersion>4.5.0-preview3-26330-0</SystemNetWebSocketsWebSocketProtocolPackageVersion>
-    <SystemNumericsVectorsPackageVersion>4.5.0-preview3-26330-0</SystemNumericsVectorsPackageVersion>
-    <SystemRuntimeCompilerServicesUnsafePackageVersion>4.5.0-preview3-26330-0</SystemRuntimeCompilerServicesUnsafePackageVersion>
-    <SystemSecurityPrincipalWindowsPackageVersion>4.5.0-preview3-26330-0</SystemSecurityPrincipalWindowsPackageVersion>
+    <SystemMemoryPackageVersion>4.5.0-preview3-26331-02</SystemMemoryPackageVersion>
+    <SystemNetWebSocketsWebSocketProtocolPackageVersion>4.5.0-preview3-26331-02</SystemNetWebSocketsWebSocketProtocolPackageVersion>
+    <SystemNumericsVectorsPackageVersion>4.5.0-preview3-26331-02</SystemNumericsVectorsPackageVersion>
+    <SystemRuntimeCompilerServicesUnsafePackageVersion>4.5.0-preview3-26331-02</SystemRuntimeCompilerServicesUnsafePackageVersion>
+    <SystemSecurityPrincipalWindowsPackageVersion>4.5.0-preview3-26331-02</SystemSecurityPrincipalWindowsPackageVersion>
     <Tooling_NewtonsoftJsonPackageVersion>9.0.1</Tooling_NewtonsoftJsonPackageVersion>
     <XunitPackageVersion>2.3.1</XunitPackageVersion>
     <XunitRunnerVisualStudioPackageVersion>2.4.0-beta.1.build3945</XunitRunnerVisualStudioPackageVersion>