diff --git a/build/dependencies.props b/build/dependencies.props
index a74d930051..a05a7b3a8f 100644
--- a/build/dependencies.props
+++ b/build/dependencies.props
@@ -3,47 +3,47 @@
     <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
   </PropertyGroup>
   <PropertyGroup Label="Package Versions">
-    <DotNetEfPackageVersion>2.1.0-preview3-32233</DotNetEfPackageVersion>
-    <InternalAspNetCoreSdkPackageVersion>2.1.0-preview3-17018</InternalAspNetCoreSdkPackageVersion>
-    <MicrosoftAspNetCoreAppPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreAppPackageVersion>
-    <MicrosoftAspNetCoreAllPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreAllPackageVersion>
-    <MicrosoftAspNetCoreAuthenticationAzureADB2CUIPackageVersion>2.1.0-preview2-32233</MicrosoftAspNetCoreAuthenticationAzureADB2CUIPackageVersion>
-    <MicrosoftAspNetCoreAuthenticationAzureADUIPackageVersion>2.1.0-preview2-32233</MicrosoftAspNetCoreAuthenticationAzureADUIPackageVersion>
-    <MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>
-    <MicrosoftAspNetCoreAuthenticationJwtBearerPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreAuthenticationJwtBearerPackageVersion>
-    <MicrosoftAspNetCoreAuthenticationOpenIdConnectPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreAuthenticationOpenIdConnectPackageVersion>
-    <MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>
-    <MicrosoftAspNetCoreCookiePolicyPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreCookiePolicyPackageVersion>
-    <MicrosoftAspNetCoreDiagnosticsEntityFrameworkCorePackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreDiagnosticsEntityFrameworkCorePackageVersion>
-    <MicrosoftAspNetCoreHttpsPolicyPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreHttpsPolicyPackageVersion>
-    <MicrosoftAspNetCoreIdentityEntityFrameworkCorePackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreIdentityEntityFrameworkCorePackageVersion>
-    <MicrosoftAspNetCoreIdentityUIPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreIdentityUIPackageVersion>
-    <MicrosoftAspNetCoreMvcPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreMvcPackageVersion>
-    <MicrosoftAspNetCoreMvcRazorViewCompilationPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreMvcRazorViewCompilationPackageVersion>
-    <MicrosoftAspNetCorePackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCorePackageVersion>
-    <MicrosoftAspNetCoreSpaServicesExtensionsPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreSpaServicesExtensionsPackageVersion>
-    <MicrosoftAspNetCoreSpaServicesPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreSpaServicesPackageVersion>
-    <MicrosoftAspNetCoreStaticFilesPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreStaticFilesPackageVersion>
-    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-preview3-32233</MicrosoftAspNetCoreTestingPackageVersion>
+    <DotNetEfPackageVersion>2.1.0-rc1-30613</DotNetEfPackageVersion>
+    <InternalAspNetCoreSdkPackageVersion>2.1.0-rc1-15774</InternalAspNetCoreSdkPackageVersion>
+    <MicrosoftAspNetCoreAllPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreAllPackageVersion>
+    <MicrosoftAspNetCoreAppPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreAppPackageVersion>
+    <MicrosoftAspNetCoreAuthenticationAzureADB2CUIPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreAuthenticationAzureADB2CUIPackageVersion>
+    <MicrosoftAspNetCoreAuthenticationAzureADUIPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreAuthenticationAzureADUIPackageVersion>
+    <MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreAuthenticationCookiesPackageVersion>
+    <MicrosoftAspNetCoreAuthenticationJwtBearerPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreAuthenticationJwtBearerPackageVersion>
+    <MicrosoftAspNetCoreAuthenticationOpenIdConnectPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreAuthenticationOpenIdConnectPackageVersion>
+    <MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreCertificatesGenerationSourcesPackageVersion>
+    <MicrosoftAspNetCoreCookiePolicyPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreCookiePolicyPackageVersion>
+    <MicrosoftAspNetCoreDiagnosticsEntityFrameworkCorePackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreDiagnosticsEntityFrameworkCorePackageVersion>
+    <MicrosoftAspNetCoreHttpsPolicyPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreHttpsPolicyPackageVersion>
+    <MicrosoftAspNetCoreIdentityEntityFrameworkCorePackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreIdentityEntityFrameworkCorePackageVersion>
+    <MicrosoftAspNetCoreIdentityUIPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreIdentityUIPackageVersion>
+    <MicrosoftAspNetCoreMvcPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreMvcPackageVersion>
+    <MicrosoftAspNetCoreMvcRazorViewCompilationPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreMvcRazorViewCompilationPackageVersion>
+    <MicrosoftAspNetCorePackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCorePackageVersion>
+    <MicrosoftAspNetCoreSpaServicesExtensionsPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreSpaServicesExtensionsPackageVersion>
+    <MicrosoftAspNetCoreSpaServicesPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreSpaServicesPackageVersion>
+    <MicrosoftAspNetCoreStaticFilesPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreStaticFilesPackageVersion>
+    <MicrosoftAspNetCoreTestingPackageVersion>2.1.0-rc1-30613</MicrosoftAspNetCoreTestingPackageVersion>
     <MicrosoftBuildFrameworkPackageVersion>15.6.82</MicrosoftBuildFrameworkPackageVersion>
     <MicrosoftBuildUtilitiesCorePackageVersion>15.6.82</MicrosoftBuildUtilitiesCorePackageVersion>
-    <MicrosoftEntityFrameworkCoreSqlitePackageVersion>2.1.0-preview3-32233</MicrosoftEntityFrameworkCoreSqlitePackageVersion>
-    <MicrosoftEntityFrameworkCoreSqlServerPackageVersion>2.1.0-preview3-32233</MicrosoftEntityFrameworkCoreSqlServerPackageVersion>
-    <MicrosoftEntityFrameworkCoreToolsPackageVersion>2.1.0-preview3-32233</MicrosoftEntityFrameworkCoreToolsPackageVersion>
-    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.1.0-preview3-32233</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
-    <MicrosoftExtensionsProcessSourcesPackageVersion>2.1.0-preview3-32233</MicrosoftExtensionsProcessSourcesPackageVersion>
+    <MicrosoftEntityFrameworkCoreSqlitePackageVersion>2.1.0-rc1-30613</MicrosoftEntityFrameworkCoreSqlitePackageVersion>
+    <MicrosoftEntityFrameworkCoreSqlServerPackageVersion>2.1.0-rc1-30613</MicrosoftEntityFrameworkCoreSqlServerPackageVersion>
+    <MicrosoftEntityFrameworkCoreToolsPackageVersion>2.1.0-rc1-30613</MicrosoftEntityFrameworkCoreToolsPackageVersion>
+    <MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>2.1.0-rc1-30613</MicrosoftExtensionsCommandLineUtilsSourcesPackageVersion>
+    <MicrosoftExtensionsProcessSourcesPackageVersion>2.1.0-rc1-30613</MicrosoftExtensionsProcessSourcesPackageVersion>
     <MicrosoftNETCoreApp20PackageVersion>2.0.0</MicrosoftNETCoreApp20PackageVersion>
-    <MicrosoftNETCoreApp21PackageVersion>2.1.0-preview3-26413-05</MicrosoftNETCoreApp21PackageVersion>
-    <MicrosoftNETSdkRazorPackageVersion>2.1.0-preview3-32233</MicrosoftNETSdkRazorPackageVersion>
+    <MicrosoftNETCoreApp21PackageVersion>2.1.0-rc1-26419-02</MicrosoftNETCoreApp21PackageVersion>
+    <MicrosoftNETSdkRazorPackageVersion>2.1.0-rc1-30613</MicrosoftNETSdkRazorPackageVersion>
     <MicrosoftNETTestSdkPackageVersion>15.6.1</MicrosoftNETTestSdkPackageVersion>
+    <MicrosoftVisualStudioWebBrowserLinkPackageVersion>2.1.0-rc1-30613</MicrosoftVisualStudioWebBrowserLinkPackageVersion>
+    <MicrosoftVisualStudioWebCodeGenerationDesignPackageVersion>2.1.0-rc1-30613</MicrosoftVisualStudioWebCodeGenerationDesignPackageVersion>
     <NETStandardLibrary20PackageVersion>2.0.1</NETStandardLibrary20PackageVersion>
-    <MicrosoftVisualStudioWebBrowserLinkPackageVersion>2.1.0-preview3-32233</MicrosoftVisualStudioWebBrowserLinkPackageVersion>
-    <MicrosoftVisualStudioWebCodeGenerationDesignPackageVersion>2.1.0-preview3-32233</MicrosoftVisualStudioWebCodeGenerationDesignPackageVersion>
     <SeleniumFirefoxWebDriverPackageVersion>0.19.0</SeleniumFirefoxWebDriverPackageVersion>
     <SeleniumSupportPackageVersion>3.7.0</SeleniumSupportPackageVersion>
     <SeleniumWebDriverMicrosoftDriverPackageVersion>16.16299.0</SeleniumWebDriverMicrosoftDriverPackageVersion>
     <SeleniumWebDriverPackageVersion>3.7.0</SeleniumWebDriverPackageVersion>
-    <SystemSecurityPermissionsPackageVersion>4.5.0-preview3-26413-02</SystemSecurityPermissionsPackageVersion>
+    <SystemSecurityPermissionsPackageVersion>4.5.0-rc1-26419-03</SystemSecurityPermissionsPackageVersion>
     <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 0ac58a0103..d35f5d62cf 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:2.1.0-rc1-15770
-commithash:a2abdc6fa0e8a1a465e830100950f1ecc698ab28
+version:2.1.0-rc1-15774
+commithash:ed5ca9de3c652347dbb0158a9a65eff3471d2114