diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 6874c4c9d..c72e6efe7 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -2,17 +2,17 @@
 <Dependencies>
   <ProductDependencies>
     <!-- Winforms / WPF -->
-    <Dependency Name="Microsoft.WindowsDesktop.App" Version="3.0.0-preview6-27720-01">
+    <Dependency Name="Microsoft.WindowsDesktop.App" Version="3.0.0-preview6-27720-04">
       <Uri>https://github.com/dotnet/core-setup</Uri>
-      <Sha>fb3db4cad0415b2214edb82667952ab8e558d57c</Sha>
+      <Sha>cdfc67fd8eee53fa482c95b14ba97c1abddb0792</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.NETCore.App" Version="3.0.0-preview6-27720-01">
+    <Dependency Name="Microsoft.NETCore.App" Version="3.0.0-preview6-27720-04">
       <Uri>https://github.com/dotnet/core-setup</Uri>
-      <Sha>fb3db4cad0415b2214edb82667952ab8e558d57c</Sha>
+      <Sha>cdfc67fd8eee53fa482c95b14ba97c1abddb0792</Sha>
     </Dependency>
-    <Dependency Name="NETStandard.Library.Ref" Version="2.1.0-preview6-27720-01">
+    <Dependency Name="NETStandard.Library.Ref" Version="2.1.0-preview6-27720-04">
       <Uri>https://github.com/dotnet/core-setup</Uri>
-      <Sha>fb3db4cad0415b2214edb82667952ab8e558d57c</Sha>
+      <Sha>cdfc67fd8eee53fa482c95b14ba97c1abddb0792</Sha>
     </Dependency>
     <Dependency Name="Microsoft.AspNetCore.App.Ref" Version="3.0.0-preview6-19270-04">
       <Uri>https://github.com/aspnet/AspNetCore</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index a4d641fb5..c6b66ba89 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -47,7 +47,7 @@
     <MicrosoftNETSdkPackageVersion>3.0.100-preview6.19267.5</MicrosoftNETSdkPackageVersion>
   </PropertyGroup>
   <PropertyGroup>
-    <MicrosoftNETCoreAppPackageVersion>3.0.0-preview6-27720-01</MicrosoftNETCoreAppPackageVersion>
+    <MicrosoftNETCoreAppPackageVersion>3.0.0-preview6-27720-04</MicrosoftNETCoreAppPackageVersion>
     <MicrosoftNETCoreAppInternalPackageVersion>$(MicrosoftNETCoreAppPackageVersion)</MicrosoftNETCoreAppInternalPackageVersion>
     <MicrosoftNETCoreDotNetAppHostPackageVersion>$(MicrosoftNETCoreAppPackageVersion)</MicrosoftNETCoreDotNetAppHostPackageVersion>
     <MicrosoftNETCoreDotNetHostResolverPackageVersion>$(MicrosoftNETCoreAppPackageVersion)</MicrosoftNETCoreDotNetHostResolverPackageVersion>
@@ -55,11 +55,11 @@
     <HostFxrVersion>$(MicrosoftNETCoreAppPackageVersion)</HostFxrVersion>
     <NetCoreAppTargetingPackVersion>$(MicrosoftNETCoreAppPackageVersion)</NetCoreAppTargetingPackVersion>
     <NetCoreAppHostPackVersion>$(MicrosoftNETCoreAppPackageVersion)</NetCoreAppHostPackVersion>
-    <NETStandardLibraryRefPackageVersion>2.1.0-preview6-27720-01</NETStandardLibraryRefPackageVersion>
+    <NETStandardLibraryRefPackageVersion>2.1.0-preview6-27720-04</NETStandardLibraryRefPackageVersion>
     <WindowsDesktopTargetingPackVersion>$(MicrosoftNETCoreAppPackageVersion)</WindowsDesktopTargetingPackVersion>
     <AspNetCoreVersion>$(MicrosoftAspNetCoreAppRuntimeWinX64PackageVersion)</AspNetCoreVersion>
     <AspNetTargetingPackVersion>$(MicrosoftAspNetCoreAppRefPackageVersion)</AspNetTargetingPackVersion>
-    <MicrosoftWindowsDesktopAppPackageVersion>3.0.0-preview6-27720-01</MicrosoftWindowsDesktopAppPackageVersion>
+    <MicrosoftWindowsDesktopAppPackageVersion>3.0.0-preview6-27720-04</MicrosoftWindowsDesktopAppPackageVersion>
     <MicrosoftWindowsDesktopPackageVersion>$(MicrosoftWindowsDesktopAppPackageVersion)</MicrosoftWindowsDesktopPackageVersion>
   </PropertyGroup>
   <!-- infrastructure and test only dependencies -->