diff --git a/build/sources.props b/build/sources.props
index 717242fc6002..29a3b61a6d2a 100644
--- a/build/sources.props
+++ b/build/sources.props
@@ -20,6 +20,7 @@
       https://dotnet.myget.org/F/aspnetcore-tools/api/v3/index.json;
       https://dotnet.myget.org/F/blazor-dev/api/v3/index.json;
       https://dotnet.myget.org/F/dotnet-core/api/v3/index.json;
+      https://dotnet.myget.org/F/nuget-build/api/v3/index.json;
       https://dotnet.myget.org/F/roslyn-tools/api/v3/index.json;
       https://dotnet.myget.org/F/roslyn/api/v3/index.json;
       https://vside.myget.org/F/devcore/api/v3/index.json;
diff --git a/build/tasks/RepoTasks.csproj b/build/tasks/RepoTasks.csproj
index 8615952bb715..cee6fea25f1d 100644
--- a/build/tasks/RepoTasks.csproj
+++ b/build/tasks/RepoTasks.csproj
@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Remove="Internal.AspNetCore.Sdk" />
-    <PackageReference Include="NuGet.Build.Tasks" Version="4.9.3" />
+    <PackageReference Include="NuGet.Build.Tasks" Version="5.1.0-rtm.5921" />
     <PackageReference Include="Microsoft.Extensions.DependencyModel" Version="2.1.0" />
     <PackageReference Include="Yarn.MSBuild" Version="1.13.0" />
   </ItemGroup>
diff --git a/global.json b/global.json
index dd1a93e0d557..339c8c9e4ca6 100644
--- a/global.json
+++ b/global.json
@@ -1,6 +1,6 @@
 {
   "sdk": {
-    "version": "3.0.100-preview4-010309"
+    "version": "3.0.100-preview4-011136"
   },
   "msbuild-sdks": {
     "Yarn.MSBuild": "1.13.0"
diff --git a/korebuild-lock.txt b/korebuild-lock.txt
index 638dfb3b2aa6..bf0fe32bb623 100644
--- a/korebuild-lock.txt
+++ b/korebuild-lock.txt
@@ -1,2 +1,2 @@
-version:3.0.0-build-20190322.1
-commithash:c38761a564c72b5bc96356ec99c89de5f281a358
+version:3.0.0-build-20190408.1
+commithash:8b533cbfa5357e5785f4c4231231c1234cfc2c5f