diff --git a/tools/protoc-gen-kitex-dubbo/generator/generator.go b/tools/protoc-gen-kitex-dubbo/generator/generator.go
index f1ee271..76cc65b 100644
--- a/tools/protoc-gen-kitex-dubbo/generator/generator.go
+++ b/tools/protoc-gen-kitex-dubbo/generator/generator.go
@@ -1,3 +1,17 @@
+// Copyright 2024 CloudWeGo Authors
+//
+// 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.
+
 package generator
 
 import (
diff --git a/tools/protoc-gen-kitex-dubbo/generator/request.go b/tools/protoc-gen-kitex-dubbo/generator/request.go
index a5b8283..bf1987e 100644
--- a/tools/protoc-gen-kitex-dubbo/generator/request.go
+++ b/tools/protoc-gen-kitex-dubbo/generator/request.go
@@ -1,3 +1,17 @@
+// Copyright 2024 CloudWeGo Authors
+//
+// 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.
+
 package generator
 
 import "google.golang.org/protobuf/compiler/protogen"
diff --git a/tools/protoc-gen-kitex-dubbo/main.go b/tools/protoc-gen-kitex-dubbo/main.go
index b698097..4a70f47 100644
--- a/tools/protoc-gen-kitex-dubbo/main.go
+++ b/tools/protoc-gen-kitex-dubbo/main.go
@@ -1,4 +1,4 @@
-// Copyright 2022 CloudWeGo Authors
+// Copyright 2024 CloudWeGo Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.