diff --git a/build/sources.props b/build/sources.props
index cada42ba91..4c4748d85a 100644
--- a/build/sources.props
+++ b/build/sources.props
@@ -9,6 +9,7 @@
       https://dotnet.myget.org/F/aspnetcore-dev/api/v3/index.json;
       https://dotnet.myget.org/F/aspnetcore-tools/api/v3/index.json;
       https://vside.myget.org/F/vssdk/api/v3/index.json;
+      https://vside.myget.org/F/devcore/api/v3/index.json
     </RestoreSources>
     <RestoreSources Condition="'$(DotNetBuildOffline)' != 'true'">
       $(RestoreSources);
diff --git a/version.props b/version.props
index 0b4b9416cf..4a7d610604 100644
--- a/version.props
+++ b/version.props
@@ -1,7 +1,7 @@
 <Project>
   <PropertyGroup>
     <VersionPrefix>3.0.0</VersionPrefix>
-    <VsixVersion>15.6</VsixVersion>
+    <VsixVersion>16.0</VsixVersion>
     <VersionSuffix>alpha1</VersionSuffix>
     <PackageVersion Condition="'$(IsFinalBuild)' == 'true' AND '$(VersionSuffix)' == 'rtm' ">$(VersionPrefix)</PackageVersion>
     <PackageVersion Condition="'$(IsFinalBuild)' == 'true' AND '$(VersionSuffix)' != 'rtm' ">$(VersionPrefix)-$(VersionSuffix)-final</PackageVersion>