diff --git a/pos_partner_firstname/__init__.py b/pos_partner_firstname/__init__.py
index 23ac4f95..0650744f 100644
--- a/pos_partner_firstname/__init__.py
+++ b/pos_partner_firstname/__init__.py
@@ -1,3 +1 @@
-# coding=utf-8
-
 from . import models
diff --git a/pos_partner_firstname/__manifest__.py b/pos_partner_firstname/__manifest__.py
index 922a9aeb..01ab31b3 100644
--- a/pos_partner_firstname/__manifest__.py
+++ b/pos_partner_firstname/__manifest__.py
@@ -1,11 +1,10 @@
-# -*- coding: utf-8 -*-
 # Copyright 2019 Roberto Fichera
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 
 {
     "name": "POS Partner Firstname",
     "summary": "POS Support of partner firstname",
-    "version": "10.0.1.0.0",
+    "version": "12.0.1.0.0",
     "development_status": "Beta",
     "category": "Point Of Sale",
     "website": "https://github.com/OCA/pos",
diff --git a/pos_partner_firstname/models/__init__.py b/pos_partner_firstname/models/__init__.py
index dd1c32cb..91fed54d 100644
--- a/pos_partner_firstname/models/__init__.py
+++ b/pos_partner_firstname/models/__init__.py
@@ -1,3 +1 @@
-# coding=utf-8
-
 from . import res_partner
diff --git a/pos_partner_firstname/models/res_partner.py b/pos_partner_firstname/models/res_partner.py
index 28812c49..ccfc4973 100644
--- a/pos_partner_firstname/models/res_partner.py
+++ b/pos_partner_firstname/models/res_partner.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright 2019 Roberto Fichera
 # License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
 
diff --git a/pos_partner_firstname/readme/CONTRIBUTORS.rst b/pos_partner_firstname/readme/CONTRIBUTORS.rst
index 1577ff91..d8df14f0 100644
--- a/pos_partner_firstname/readme/CONTRIBUTORS.rst
+++ b/pos_partner_firstname/readme/CONTRIBUTORS.rst
@@ -1 +1,2 @@
 * Roberto Fichera <roberto.fichera@levelprime.com>
+* Lorenzo Battistini (https://takobi.online)
diff --git a/pos_partner_firstname/static/src/js/screens.js b/pos_partner_firstname/static/src/js/screens.js
index 4e0975ab..d2023f5a 100644
--- a/pos_partner_firstname/static/src/js/screens.js
+++ b/pos_partner_firstname/static/src/js/screens.js
@@ -2,7 +2,6 @@ odoo.define('pos_partner_firstname.screens', function (require) {
     "use strict";
 
     var Screens = require('point_of_sale.screens');
-    var Model = require('web.Model');
 
     Screens.ClientListScreenWidget.include({
 
@@ -11,8 +10,11 @@ odoo.define('pos_partner_firstname.screens', function (require) {
         init: function(parent, options){
             var self = this;
             this._super(parent, options);
-            var P = new Model('ir.config_parameter');
-            P.call('get_param', ['partner_names_order']).then(function(partner_names_order) {
+            this._rpc({
+                model: 'ir.config_parameter',
+                method: 'get_param',
+                args: ['partner_names_order'],
+            }).then(function(partner_names_order) {
                 if (partner_names_order != false) {
                     self.partner_names_order = partner_names_order;
                 }