diff --git a/build/dependencies.props b/build/dependencies.props
index 7f6dfe70e2..4220c2c158 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -1,36 +1,36 @@
 <Project>
   <!-- These package version may be overridden or updated by automation. -->
   <PropertyGroup Label="Package Versions: Auto" Condition=" '$(DotNetPackageVersionPropsPath)' == '' ">
-    <MicrosoftCSharpPackageVersion>4.5.0-preview3-26413-02</MicrosoftCSharpPackageVersion>
-    <MicrosoftExtensionsDependencyModelPackageVersion>2.1.0-preview3-26413-05</MicrosoftExtensionsDependencyModelPackageVersion>
+    <MicrosoftCSharpPackageVersion>4.5.0-rc1-26419-03</MicrosoftCSharpPackageVersion>
+    <MicrosoftExtensionsDependencyModelPackageVersion>2.1.0-rc1-26419-02</MicrosoftExtensionsDependencyModelPackageVersion>
     <!-- MicrosoftNETCoreApp21PackageVersion is assigned at the bottom so it can automatically pick up MicrosoftNETCoreAppPackageVersion in an orchestrated build. -->
-    <MicrosoftNETCoreAppPackageVersion>2.1.0-preview3-26413-05</MicrosoftNETCoreAppPackageVersion>
-    <MicrosoftNETCoreDotNetAppHostPackageVersion>2.1.0-preview3-26413-05</MicrosoftNETCoreDotNetAppHostPackageVersion>
-    <MicrosoftWin32RegistryPackageVersion>4.5.0-preview3-26413-02</MicrosoftWin32RegistryPackageVersion>
-    <NuGetFrameworksPackageVersion>4.7.0-preview4.5065</NuGetFrameworksPackageVersion>
-    <SystemBuffersPackageVersion>4.5.0-preview3-26413-02</SystemBuffersPackageVersion>
-    <SystemCollectionsImmutablePackageVersion>1.5.0-preview3-26413-02</SystemCollectionsImmutablePackageVersion>
-    <SystemComponentModelAnnotationsPackageVersion>4.5.0-preview3-26413-02</SystemComponentModelAnnotationsPackageVersion>
-    <SystemDataSqlClientPackageVersion>4.5.0-preview3-26413-02</SystemDataSqlClientPackageVersion>
-    <SystemDiagnosticsDiagnosticSourcePackageVersion>4.5.0-preview3-26413-02</SystemDiagnosticsDiagnosticSourcePackageVersion>
-    <SystemDiagnosticsEventLogPackageVersion>4.5.0-preview3-26413-02</SystemDiagnosticsEventLogPackageVersion>
-    <SystemIOPipelinesPackageVersion>4.5.0-preview3-26413-02</SystemIOPipelinesPackageVersion>
-    <SystemMemoryPackageVersion>4.5.0-preview3-26413-02</SystemMemoryPackageVersion>
-    <SystemNetHttpWinHttpHandlerPackageVersion>4.5.0-preview3-26413-02</SystemNetHttpWinHttpHandlerPackageVersion>
-    <SystemNetWebSocketsWebSocketProtocolPackageVersion>4.5.0-preview3-26413-02</SystemNetWebSocketsWebSocketProtocolPackageVersion>
-    <SystemNumericsVectorsPackageVersion>4.5.0-preview3-26413-02</SystemNumericsVectorsPackageVersion>
-    <SystemReflectionMetadataPackageVersion>1.6.0-preview3-26413-02</SystemReflectionMetadataPackageVersion>
-    <SystemRuntimeCompilerServicesUnsafePackageVersion>4.5.0-preview3-26413-02</SystemRuntimeCompilerServicesUnsafePackageVersion>
-    <SystemSecurityCryptographyCngPackageVersion>4.5.0-preview3-26413-02</SystemSecurityCryptographyCngPackageVersion>
-    <SystemSecurityCryptographyXmlPackageVersion>4.5.0-preview3-26413-02</SystemSecurityCryptographyXmlPackageVersion>
-    <SystemSecurityPermissionsPackageVersion>4.5.0-preview3-26413-02</SystemSecurityPermissionsPackageVersion>
-    <SystemSecurityPrincipalWindowsPackageVersion>4.5.0-preview3-26413-02</SystemSecurityPrincipalWindowsPackageVersion>
-    <SystemServiceProcessServiceControllerPackageVersion>4.5.0-preview3-26413-02</SystemServiceProcessServiceControllerPackageVersion>
-    <SystemTextEncodingsWebPackageVersion>4.5.0-preview3-26413-02</SystemTextEncodingsWebPackageVersion>
-    <SystemThreadingChannelsPackageVersion>4.5.0-preview3-26413-02</SystemThreadingChannelsPackageVersion>
-    <SystemThreadingTasksDataflowPackageVersion>4.9.0-preview3-26413-02</SystemThreadingTasksDataflowPackageVersion>
-    <SystemThreadingTasksExtensionsPackageVersion>4.5.0-preview3-26413-02</SystemThreadingTasksExtensionsPackageVersion>
-    <SystemValueTuplePackageVersion>4.5.0-preview3-26413-02</SystemValueTuplePackageVersion>
+    <MicrosoftNETCoreAppPackageVersion>2.1.0-rc1-26419-02</MicrosoftNETCoreAppPackageVersion>
+    <MicrosoftNETCoreDotNetAppHostPackageVersion>2.1.0-rc1-26419-02</MicrosoftNETCoreDotNetAppHostPackageVersion>
+    <MicrosoftWin32RegistryPackageVersion>4.5.0-rc1-26419-03</MicrosoftWin32RegistryPackageVersion>
+    <NuGetFrameworksPackageVersion>4.8.0-preview1.5116</NuGetFrameworksPackageVersion>
+    <SystemBuffersPackageVersion>4.5.0-rc1-26419-03</SystemBuffersPackageVersion>
+    <SystemCollectionsImmutablePackageVersion>1.5.0-rc1-26419-03</SystemCollectionsImmutablePackageVersion>
+    <SystemComponentModelAnnotationsPackageVersion>4.5.0-rc1-26419-03</SystemComponentModelAnnotationsPackageVersion>
+    <SystemDataSqlClientPackageVersion>4.5.0-rc1-26419-03</SystemDataSqlClientPackageVersion>
+    <SystemDiagnosticsDiagnosticSourcePackageVersion>4.5.0-rc1-26419-03</SystemDiagnosticsDiagnosticSourcePackageVersion>
+    <SystemDiagnosticsEventLogPackageVersion>4.5.0-rc1-26419-03</SystemDiagnosticsEventLogPackageVersion>
+    <SystemIOPipelinesPackageVersion>4.5.0-rc1-26419-03</SystemIOPipelinesPackageVersion>
+    <SystemMemoryPackageVersion>4.5.0-rc1-26419-03</SystemMemoryPackageVersion>
+    <SystemNetHttpWinHttpHandlerPackageVersion>4.5.0-rc1-26419-03</SystemNetHttpWinHttpHandlerPackageVersion>
+    <SystemNetWebSocketsWebSocketProtocolPackageVersion>4.5.0-rc1-26419-03</SystemNetWebSocketsWebSocketProtocolPackageVersion>
+    <SystemNumericsVectorsPackageVersion>4.5.0-rc1-26419-03</SystemNumericsVectorsPackageVersion>
+    <SystemReflectionMetadataPackageVersion>1.6.0-rc1-26419-03</SystemReflectionMetadataPackageVersion>
+    <SystemRuntimeCompilerServicesUnsafePackageVersion>4.5.0-rc1-26419-03</SystemRuntimeCompilerServicesUnsafePackageVersion>
+    <SystemSecurityCryptographyCngPackageVersion>4.5.0-rc1-26419-03</SystemSecurityCryptographyCngPackageVersion>
+    <SystemSecurityCryptographyXmlPackageVersion>4.5.0-rc1-26419-03</SystemSecurityCryptographyXmlPackageVersion>
+    <SystemSecurityPermissionsPackageVersion>4.5.0-rc1-26419-03</SystemSecurityPermissionsPackageVersion>
+    <SystemSecurityPrincipalWindowsPackageVersion>4.5.0-rc1-26419-03</SystemSecurityPrincipalWindowsPackageVersion>
+    <SystemServiceProcessServiceControllerPackageVersion>4.5.0-rc1-26419-03</SystemServiceProcessServiceControllerPackageVersion>
+    <SystemTextEncodingsWebPackageVersion>4.5.0-rc1-26419-03</SystemTextEncodingsWebPackageVersion>
+    <SystemThreadingChannelsPackageVersion>4.5.0-rc1-26419-03</SystemThreadingChannelsPackageVersion>
+    <SystemThreadingTasksDataflowPackageVersion>4.9.0-rc1-26419-03</SystemThreadingTasksDataflowPackageVersion>
+    <SystemThreadingTasksExtensionsPackageVersion>4.5.0-rc1-26419-03</SystemThreadingTasksExtensionsPackageVersion>
+    <SystemValueTuplePackageVersion>4.5.0-rc1-26419-03</SystemValueTuplePackageVersion>
   </PropertyGroup>
 
   <Import Project="$(DotNetPackageVersionPropsPath)" Condition="'$(DotNetPackageVersionPropsPath)' != ''" />