diff --git a/login_bloc/lib/src/blocs/bloc.dart b/login_bloc/lib/src/blocs/bloc.dart
index cd9a51f..8365dde 100644
--- a/login_bloc/lib/src/blocs/bloc.dart
+++ b/login_bloc/lib/src/blocs/bloc.dart
@@ -10,7 +10,7 @@ class Bloc extends Object with Validators {
   Stream<String> get email => _email.stream.transform(validateEmail);
   Stream<String> get password => _password.stream.transform(validatePassword);
   Stream<bool> get submitValid =>
-      Observable.combineLatest2(email, password, (e, p) => true);
+      Rx.combineLatest2(email, password, (e, p) => true);
 
   // Change data
   Function(String) get changeEmail => _email.sink.add;