diff --git a/lib/socket/protobuf_client.dart b/lib/socket/protobuf_client.dart
index cc4a484..4eeeb06 100644
--- a/lib/socket/protobuf_client.dart
+++ b/lib/socket/protobuf_client.dart
@@ -9,7 +9,7 @@ import 'package:protobuf/protobuf.dart';
 import 'package:dart_framework/communicator.dart';
 import 'package:dart_framework/socket/packets/message_common.pb.dart';
 
-class ProtobufClient extends Communicator
+abstract class ProtobufClient extends Communicator
 {
   final int _headerSize = 4;
   final Socket _socket;