diff --git a/lib/country_code_picker.dart b/lib/country_code_picker.dart
index af0058c..f77be98 100644
--- a/lib/country_code_picker.dart
+++ b/lib/country_code_picker.dart
@@ -2,7 +2,7 @@ library country_code_picker;
 
 import 'package:country_code_picker/country_codes.dart';
 import 'package:flutter/material.dart';
-import 'package:country_code_picker/selectionDialog.dart';
+import 'package:country_code_picker/selection_dialog.dart';
 import 'package:country_code_picker/celement.dart';
 
 class CountryCodePicker extends StatefulWidget {
diff --git a/lib/selectionDialog.dart b/lib/selection_dialog.dart
similarity index 100%
rename from lib/selectionDialog.dart
rename to lib/selection_dialog.dart
diff --git a/pubspec.yaml b/pubspec.yaml
index 83b56c3..e501f5b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,8 +1,11 @@
 name: country_code_picker
 description: A flutter package for showing a country code selector. 
 version: 0.0.1
-author: Salvatore Giordano
-homepage: https://github.com/Salvatore-Giordano
+author: Salvatore-Giordano <salvatoregiordanoo@gmail.com>
+homepage: https://github.com/Salvatore-Giordano/CountryCodePicker
+
+environment:
+  sdk: ">=1.2.0  <=2.0.0"
 
 dependencies:
   flutter: