diff --git a/.gitmodules b/.gitmodules
index a9760110..9c14c26b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,7 +1,4 @@
 
-[submodule "src/SkyApm.Transport.Grpc.Protocol/protocol"]
-	path = src/SkyApm.Transport.Grpc.Protocol/protocol
-	url = https://github.com/apache/incubator-skywalking-data-collect-protocol
 [submodule "src/SkyApm.Transport.Grpc.Protocol/protocol-v3"]
 	path = src/SkyApm.Transport.Grpc.Protocol/protocol-v3
 	url = https://github.com/apache/incubator-skywalking-data-collect-protocol
diff --git a/README.md b/README.md
index aac8f550..b1b4a738 100644
--- a/README.md
+++ b/README.md
@@ -96,9 +96,6 @@ Use `dotnet skyapm config [your_service_name] [your_servers]` to generate config
 dotnet skyapm config sample_app 192.168.0.1:11800
 ```
 
-# Roadmap
-[What are we going to do next?](/docs/roadmap.md)
-
 # Contributing
 This section is in progress here: [Contributing to SkyAPM-dotnet](/CONTIBUTING.md)
 
diff --git a/docs/roadmap.md b/docs/roadmap.md
deleted file mode 100644
index cb41e69c..00000000
--- a/docs/roadmap.md
+++ /dev/null
@@ -1,20 +0,0 @@
-# Roadmap
-
-## v0.8.0
-- TraceContext refactoring.
-- Upgrade to Skywalking 6.0 protocol.
-- Fix known bugs in the issue list.
-- ASP.NET request tracing.
-
-## v0.9.0
-- CLR runtime monitoring(need backend support).
-- Support IIS monitoring and tracing.
-- WCF request tracing.
-- Custom Sampling Interceptor.
-- Custom Configuration Loading.
-- Performance optimization
-
-## v1.0.0
-- CLR Profiler(Experimental feature)
-- Support plug-in.
-- More third-party library support, such as mysql, redis, kafka, rabbitmq..
diff --git a/src/SkyApm.Transport.Grpc.Protocol/SkyApm.Transport.Grpc.Protocol.csproj b/src/SkyApm.Transport.Grpc.Protocol/SkyApm.Transport.Grpc.Protocol.csproj
index 0eec5564..b334cf9f 100644
--- a/src/SkyApm.Transport.Grpc.Protocol/SkyApm.Transport.Grpc.Protocol.csproj
+++ b/src/SkyApm.Transport.Grpc.Protocol/SkyApm.Transport.Grpc.Protocol.csproj
@@ -21,7 +21,6 @@
     </ItemGroup>
     
     <ItemGroup>
-        <Protobuf Include="protocol/**/*.proto" ProtoRoot="protocol" OutputDir="%(RelativePath)generated" CompileOutputs="false" />
 		<Protobuf Include="protocol-v3/**/*.proto" ProtoRoot="protocol-v3" OutputDir="%(RelativePath)generated-v3" CompileOutputs="false" />
     </ItemGroup>
 
diff --git a/src/SkyApm.Transport.Grpc.Protocol/protocol-v3 b/src/SkyApm.Transport.Grpc.Protocol/protocol-v3
index 87ed1f4e..29552022 160000
--- a/src/SkyApm.Transport.Grpc.Protocol/protocol-v3
+++ b/src/SkyApm.Transport.Grpc.Protocol/protocol-v3
@@ -1 +1 @@
-Subproject commit 87ed1f4e31b0517a7efff27d46a47829c7f533f9
+Subproject commit 29552022b01a55ec197641f569f19c1648d49acd