diff --git a/Ix.NET/Source/System.Linq.Async/System.Linq.Async.csproj b/Ix.NET/Source/System.Linq.Async/System.Linq.Async.csproj
index 2546c08f9d..8f5e3a9624 100644
--- a/Ix.NET/Source/System.Linq.Async/System.Linq.Async.csproj
+++ b/Ix.NET/Source/System.Linq.Async/System.Linq.Async.csproj
@@ -23,7 +23,8 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Condition="'$(TargetFramework)' != 'netcoreapp3.0' and '$(TargetFramework)' != 'netstandard2.1' " Include="Microsoft.Bcl.AsyncInterfaces" Version="1.0.0-preview6.19303.8" />
+    <PackageReference Condition="'$(TargetFramework)' != 'netcoreapp3.0' and '$(TargetFramework)' != 'netstandard2.1' " 
+                      Include="Microsoft.Bcl.AsyncInterfaces" Version="1.0.0" />
     <ReferenceAssemblyProjectReference Include="..\refs\System.Linq.Async.Ref\System.Linq.Async.Ref.csproj" />
   </ItemGroup>
 
@@ -87,8 +88,4 @@
     </None>
   </ItemGroup>
 
-  <ItemGroup>
-    <Service Include="{508349b6-6b84-4df5-91f0-309beebad82d}" />
-  </ItemGroup>
-
 </Project>
diff --git a/Ix.NET/Source/global.json b/Ix.NET/Source/global.json
index b86f73d1d1..6779b8fcad 100644
--- a/Ix.NET/Source/global.json
+++ b/Ix.NET/Source/global.json
@@ -1,7 +1,4 @@
 {
-  "sdk": {
-    "version": "3.0.100-preview"
-  },
   "msbuild-sdks": {
     "MSBuild.Sdk.Extras": "2.0.46"
   }
diff --git a/Ix.NET/Source/refs/System.Linq.Async.Ref/System.Linq.Async.Ref.csproj b/Ix.NET/Source/refs/System.Linq.Async.Ref/System.Linq.Async.Ref.csproj
index ac5de756db..547673f40e 100644
--- a/Ix.NET/Source/refs/System.Linq.Async.Ref/System.Linq.Async.Ref.csproj
+++ b/Ix.NET/Source/refs/System.Linq.Async.Ref/System.Linq.Async.Ref.csproj
@@ -9,7 +9,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Condition="'$(TargetFramework)' != 'netcoreapp3.0' and '$(TargetFramework)' != 'netstandard2.1' " Include="Microsoft.Bcl.AsyncInterfaces" Version="1.0.0-preview6.19303.8" />
+    <PackageReference Condition="'$(TargetFramework)' != 'netcoreapp3.0' and '$(TargetFramework)' != 'netstandard2.1' " 
+                      Include="Microsoft.Bcl.AsyncInterfaces" Version="1.0.0" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/Ix.NET/Source/version.json b/Ix.NET/Source/version.json
index 98ce34077d..2a98c57018 100644
--- a/Ix.NET/Source/version.json
+++ b/Ix.NET/Source/version.json
@@ -1,8 +1,9 @@
 {
-  "version": "4.0.0-preview.8.build.{height}",
+  "version": "4.1.0-preview.{height}",
   "publicReleaseRefSpec": [
     "^refs/heads/master$", // we release out of master
-    "^refs/heads/rel/v\\d+\\.\\d+" // we also release branches starting with vN.N
+    "^refs/heads/rel/v\\d+\\.\\d+", // we also release branches starting with vN.N
+    "^refs/heads/rel/ix-v\\d+\\.\\d+" // we also release branches starting with vN.N
   ],
   "nugetPackageVersion":{
     "semVer": 2