diff --git a/codec/frame.proto b/codec/frame.proto
new file mode 100644
index 0000000..adb10a5
--- /dev/null
+++ b/codec/frame.proto
@@ -0,0 +1,28 @@
+// Copyright 2021 Unistack LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+syntax = "proto3";
+
+package micro.codec;
+
+option cc_enable_arenas = true;
+option go_package = "go.unistack.org/micro-proto/v3/codec;codec";
+option java_multiple_files = true;
+option java_outer_classname = "MicroCodec";
+option java_package = "micro.codec";
+option objc_class_prefix = "MCODEC";
+
+message Frame {
+  bytes data = 1;
+}
diff --git a/generate.go b/generate.go
index ea35616..debfaa0 100644
--- a/generate.go
+++ b/generate.go
@@ -12,3 +12,4 @@ package main
 //go:generate protoc -I. -I./openapiv3 --go_out=paths=source_relative:. ./openapiv3/openapiv3.proto
 //go:generate protoc -I. -I./tag --go_out=paths=source_relative:. ./tag/tag.proto
 //go:generate protoc -I. -I./tag --go_out=paths=source_relative:. ./errors/errors.proto
+//go:generate protoc -I. -I./tag --go_out=paths=source_relative:. ./codec/frame.proto