diff --git a/src/DotNetCore.CAP.OpenTelemetry/CapDiagnosticListener.cs b/src/DotNetCore.CAP.OpenTelemetry/CapDiagnosticListener.cs
deleted file mode 100644
index 583daf4..0000000
--- a/src/DotNetCore.CAP.OpenTelemetry/CapDiagnosticListener.cs
+++ /dev/null
@@ -1,35 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
-using System.Diagnostics.Tracing;
-using OpenTelemetry.Instrumentation;
-using System.Diagnostics;
-using System.Reflection;
-
-namespace DotNetCore.CAP.OpenTelemetry
-{
-    public class CapDiagnosticListener : EventSource
-    {
-        internal static readonly ActivitySource ActivitySource = new ActivitySource("", "");
-
-        public CapDiagnosticListener()
-        {
-            // var count = new System.Diagnostics.Tracing.DiagnosticCounter();
-
-        }
-
-    }
-
-    internal sealed partial class HttpTelemetry : EventSource
-    {
-        public static readonly HttpTelemetry Log = new HttpTelemetry();
-
-
-        [Event(1, Level = EventLevel.Informational)]
-        private void RequestStart(string scheme, string host, int port, string pathAndQuery, byte versionMajor, byte versionMinor, HttpVersionPolicy versionPolicy)
-        {
-            Interlocked.Increment(ref _startedRequests);
-            WriteEvent(eventId: 1, scheme, host, port, pathAndQuery, versionMajor, versionMinor, versionPolicy);
-        }
-    }
-}
diff --git a/src/DotNetCore.CAP.OpenTelemetry/DotNetCore.CAP.OpenTelemetry.csproj b/src/DotNetCore.CAP.OpenTelemetry/DotNetCore.CAP.OpenTelemetry.csproj
index ef1c4d4..4592514 100644
--- a/src/DotNetCore.CAP.OpenTelemetry/DotNetCore.CAP.OpenTelemetry.csproj
+++ b/src/DotNetCore.CAP.OpenTelemetry/DotNetCore.CAP.OpenTelemetry.csproj
@@ -2,20 +2,15 @@
 
   <PropertyGroup>
     <TargetFramework>netstandard2.1</TargetFramework>
-    <AssemblyName>DotNetCore.CAP.OpenTelemetry</AssemblyName>
+	<Nullable>enable</Nullable>
 	<Description>CAP instrumentation for OpenTelemetry .NET</Description>
     <PackageTags>$(PackageTags);distributed-tracing</PackageTags>
   </PropertyGroup>
-  
-  <PropertyGroup>
-    <DocumentationFile>bin\$(Configuration)\netstandard2.1\DotNetCore.CAP.OpenTelemetry.xml</DocumentationFile>
-    <NoWarn>1701;1702;1705;CS1591</NoWarn>
-  </PropertyGroup>
-  
+
   <ItemGroup>
-	  <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="5.0.1" />
-    <PackageReference Include="OpenTelemetry" Version="1.1.0" />
-  </ItemGroup>
+    <PackageReference Include="OpenTelemetry" Version="1.2.0-rc1" />
+  </ItemGroup> 
+  
 
   <ItemGroup>
     <ProjectReference Include="..\DotNetCore.CAP\DotNetCore.CAP.csproj" />