diff --git a/cmd/protoc-gen-go-errors/main.go b/cmd/protoc-gen-go-errors/main.go
index e4f806ea..16b4234b 100644
--- a/cmd/protoc-gen-go-errors/main.go
+++ b/cmd/protoc-gen-go-errors/main.go
@@ -25,6 +25,7 @@ package main
 import (
 	"flag"
 	"fmt"
+	"path/filepath"
 
 	"google.golang.org/protobuf/compiler/protogen"
 	"google.golang.org/protobuf/types/pluginpb"
@@ -41,12 +42,16 @@ func main() {
 		return
 	}
 	var flags flag.FlagSet
+	file := flags.String("file", "", "specified proto files (default value: errors.proto)")
 	protogen.Options{ParamFunc: flags.Set}.Run(func(gen *protogen.Plugin) error {
 		gen.SupportedFeatures = uint64(pluginpb.CodeGeneratorResponse_FEATURE_PROTO3_OPTIONAL)
 		for _, f := range gen.Files {
 			if !f.Generate {
 				continue
 			}
+			if filepath.Base(f.Proto.GetName()) != *file {
+				continue
+			}
 			generateFile(gen, f)
 		}
 		return nil
diff --git a/examples/grpc/errors/error.sh b/examples/grpc/errors/error.sh
index e93f542f..1ecb5e64 100755
--- a/examples/grpc/errors/error.sh
+++ b/examples/grpc/errors/error.sh
@@ -4,4 +4,4 @@
 rm -rf ./protoc-gen-go-errors
 go build -o ./protoc-gen-go-errors ../../../cmd/protoc-gen-go-errors
 export PATH=$PATH:$(pwd)/
-protoc --proto_path=. --go_out=paths=source_relative:. --go-errors_out=paths=source_relative:. ./myerr.proto
+protoc --proto_path=. --go_out=paths=source_relative:. --go-errors_out=paths=source_relative,file=errors.proto:. ./errors.proto
diff --git a/examples/grpc/errors/myerr.pb.go b/examples/grpc/errors/errors.pb.go
similarity index 50%
rename from examples/grpc/errors/myerr.pb.go
rename to examples/grpc/errors/errors.pb.go
index 07c2eaa0..38e1b5cb 100644
--- a/examples/grpc/errors/myerr.pb.go
+++ b/examples/grpc/errors/errors.pb.go
@@ -2,7 +2,7 @@
 // versions:
 // 	protoc-gen-go v1.26.0
 // 	protoc        v3.17.3
-// source: myerr.proto
+// source: errors.proto
 
 package bizv1
 
@@ -60,11 +60,11 @@ func (x Err) String() string {
 }
 
 func (Err) Descriptor() protoreflect.EnumDescriptor {
-	return file_myerr_proto_enumTypes[0].Descriptor()
+	return file_errors_proto_enumTypes[0].Descriptor()
 }
 
 func (Err) Type() protoreflect.EnumType {
-	return &file_myerr_proto_enumTypes[0]
+	return &file_errors_proto_enumTypes[0]
 }
 
 func (x Err) Number() protoreflect.EnumNumber {
@@ -73,41 +73,41 @@ func (x Err) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use Err.Descriptor instead.
 func (Err) EnumDescriptor() ([]byte, []int) {
-	return file_myerr_proto_rawDescGZIP(), []int{0}
+	return file_errors_proto_rawDescGZIP(), []int{0}
 }
 
-var File_myerr_proto protoreflect.FileDescriptor
-
-var file_myerr_proto_rawDesc = []byte{
-	0x0a, 0x0b, 0x6d, 0x79, 0x65, 0x72, 0x72, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x06, 0x62,
-	0x69, 0x7a, 0x2e, 0x76, 0x31, 0x2a, 0x47, 0x0a, 0x03, 0x45, 0x72, 0x72, 0x12, 0x0f, 0x0a, 0x0b,
-	0x45, 0x52, 0x52, 0x5f, 0x49, 0x4e, 0x56, 0x41, 0x4c, 0x49, 0x44, 0x10, 0x00, 0x12, 0x16, 0x0a,
-	0x12, 0x45, 0x52, 0x52, 0x5f, 0x55, 0x53, 0x45, 0x52, 0x5f, 0x4e, 0x4f, 0x54, 0x5f, 0x46, 0x4f,
-	0x55, 0x4e, 0x44, 0x10, 0x01, 0x12, 0x17, 0x0a, 0x13, 0x45, 0x52, 0x52, 0x5f, 0x43, 0x4f, 0x4e,
-	0x54, 0x45, 0x4e, 0x54, 0x5f, 0x4d, 0x49, 0x53, 0x53, 0x49, 0x4e, 0x47, 0x10, 0x02, 0x42, 0x2a,
-	0x0a, 0x0e, 0x63, 0x6f, 0x6d, 0x2e, 0x65, 0x67, 0x6f, 0x2e, 0x62, 0x69, 0x7a, 0x2e, 0x76, 0x31,
-	0x42, 0x08, 0x42, 0x69, 0x7a, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x0c, 0x62, 0x69,
-	0x7a, 0x2f, 0x76, 0x31, 0x3b, 0x62, 0x69, 0x7a, 0x76, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74,
-	0x6f, 0x33,
+var File_errors_proto protoreflect.FileDescriptor
+
+var file_errors_proto_rawDesc = []byte{
+	0x0a, 0x0c, 0x65, 0x72, 0x72, 0x6f, 0x72, 0x73, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x12, 0x06,
+	0x62, 0x69, 0x7a, 0x2e, 0x76, 0x31, 0x2a, 0x47, 0x0a, 0x03, 0x45, 0x72, 0x72, 0x12, 0x0f, 0x0a,
+	0x0b, 0x45, 0x52, 0x52, 0x5f, 0x49, 0x4e, 0x56, 0x41, 0x4c, 0x49, 0x44, 0x10, 0x00, 0x12, 0x16,
+	0x0a, 0x12, 0x45, 0x52, 0x52, 0x5f, 0x55, 0x53, 0x45, 0x52, 0x5f, 0x4e, 0x4f, 0x54, 0x5f, 0x46,
+	0x4f, 0x55, 0x4e, 0x44, 0x10, 0x01, 0x12, 0x17, 0x0a, 0x13, 0x45, 0x52, 0x52, 0x5f, 0x43, 0x4f,
+	0x4e, 0x54, 0x45, 0x4e, 0x54, 0x5f, 0x4d, 0x49, 0x53, 0x53, 0x49, 0x4e, 0x47, 0x10, 0x02, 0x42,
+	0x2a, 0x0a, 0x0e, 0x63, 0x6f, 0x6d, 0x2e, 0x65, 0x67, 0x6f, 0x2e, 0x62, 0x69, 0x7a, 0x2e, 0x76,
+	0x31, 0x42, 0x08, 0x42, 0x69, 0x7a, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x0c, 0x62,
+	0x69, 0x7a, 0x2f, 0x76, 0x31, 0x3b, 0x62, 0x69, 0x7a, 0x76, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f,
+	0x74, 0x6f, 0x33,
 }
 
 var (
-	file_myerr_proto_rawDescOnce sync.Once
-	file_myerr_proto_rawDescData = file_myerr_proto_rawDesc
+	file_errors_proto_rawDescOnce sync.Once
+	file_errors_proto_rawDescData = file_errors_proto_rawDesc
 )
 
-func file_myerr_proto_rawDescGZIP() []byte {
-	file_myerr_proto_rawDescOnce.Do(func() {
-		file_myerr_proto_rawDescData = protoimpl.X.CompressGZIP(file_myerr_proto_rawDescData)
+func file_errors_proto_rawDescGZIP() []byte {
+	file_errors_proto_rawDescOnce.Do(func() {
+		file_errors_proto_rawDescData = protoimpl.X.CompressGZIP(file_errors_proto_rawDescData)
 	})
-	return file_myerr_proto_rawDescData
+	return file_errors_proto_rawDescData
 }
 
-var file_myerr_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_myerr_proto_goTypes = []interface{}{
+var file_errors_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
+var file_errors_proto_goTypes = []interface{}{
 	(Err)(0), // 0: biz.v1.Err
 }
-var file_myerr_proto_depIdxs = []int32{
+var file_errors_proto_depIdxs = []int32{
 	0, // [0:0] is the sub-list for method output_type
 	0, // [0:0] is the sub-list for method input_type
 	0, // [0:0] is the sub-list for extension type_name
@@ -115,27 +115,27 @@ var file_myerr_proto_depIdxs = []int32{
 	0, // [0:0] is the sub-list for field type_name
 }
 
-func init() { file_myerr_proto_init() }
-func file_myerr_proto_init() {
-	if File_myerr_proto != nil {
+func init() { file_errors_proto_init() }
+func file_errors_proto_init() {
+	if File_errors_proto != nil {
 		return
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
-			RawDescriptor: file_myerr_proto_rawDesc,
+			RawDescriptor: file_errors_proto_rawDesc,
 			NumEnums:      1,
 			NumMessages:   0,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
-		GoTypes:           file_myerr_proto_goTypes,
-		DependencyIndexes: file_myerr_proto_depIdxs,
-		EnumInfos:         file_myerr_proto_enumTypes,
+		GoTypes:           file_errors_proto_goTypes,
+		DependencyIndexes: file_errors_proto_depIdxs,
+		EnumInfos:         file_errors_proto_enumTypes,
 	}.Build()
-	File_myerr_proto = out.File
-	file_myerr_proto_rawDesc = nil
-	file_myerr_proto_goTypes = nil
-	file_myerr_proto_depIdxs = nil
+	File_errors_proto = out.File
+	file_errors_proto_rawDesc = nil
+	file_errors_proto_goTypes = nil
+	file_errors_proto_depIdxs = nil
 }
diff --git a/examples/grpc/errors/myerr.proto b/examples/grpc/errors/errors.proto
similarity index 100%
rename from examples/grpc/errors/myerr.proto
rename to examples/grpc/errors/errors.proto
diff --git a/examples/grpc/errors/myerr_errors.pb.go b/examples/grpc/errors/errors_errors.pb.go
similarity index 100%
rename from examples/grpc/errors/myerr_errors.pb.go
rename to examples/grpc/errors/errors_errors.pb.go