diff --git a/lib/src/banks.dart b/lib/src/banks.dart
index b6d493e..7052811 100644
--- a/lib/src/banks.dart
+++ b/lib/src/banks.dart
@@ -1,8 +1,7 @@
-const Map<String, String> banks = {
+const banks = {
   '138': '40138',
   '133': '40133',
   '062': '40062',
-  '661': '90661',
   '638': '90638',
   '706': '90706',
   '659': '90659',
@@ -32,6 +31,7 @@ const Map<String, String> banks = {
   '677': '90677',
   '683': '90683',
   '630': '90630',
+  '124': '40124',
   '143': '40143',
   '631': '90631',
   '901': '90901',
@@ -43,10 +43,12 @@ const Map<String, String> banks = {
   '126': '40126',
   '680': '90680',
   '723': '90723',
+  '722': '90722',
   '151': '40151',
   '616': '90616',
   '634': '90634',
   '689': '90689',
+  '699': '90699',
   '685': '90685',
   '601': '90601',
   '168': '37168',
@@ -59,6 +61,7 @@ const Map<String, String> banks = {
   '686': '90686',
   '059': '40059',
   '110': '40110',
+  '661': '90661',
   '653': '90653',
   '670': '90670',
   '602': '90602',
@@ -77,6 +80,7 @@ const Map<String, String> banks = {
   '014': '40014',
   '044': '40044',
   '157': '40157',
+  '728': '90728',
   '646': '90646',
   '648': '90648',
   '656': '90656',
@@ -88,12 +92,12 @@ const Map<String, String> banks = {
   '141': '40141',
 };
 
-// Descargado de http://www.banxico.org.mx/cep/ por 2019-01-21
-const Map<String, String> bankNames = {
+// # Descargado de https://www.banxico.org.mx/cep-scl/listaInstituciones.do
+// # 2022-10-18
+const bankNames = {
   '40138': 'ABC Capital',
   '40133': 'Actinver',
   '40062': 'Afirme',
-  '90661': 'ALTERNATIVOS',
   '90706': 'Arcus',
   '90659': 'Asp Integra Opc',
   '40128': 'Autofin',
@@ -122,6 +126,7 @@ const Map<String, String> bankNames = {
   '90677': 'Caja Pop Mexica',
   '90683': 'Caja Telefonist',
   '90630': 'CB Intercam',
+  '40124': 'CBM Banco',
   '40143': 'CI Banco',
   '90631': 'CI Bolsa',
   '90901': 'Cls',
@@ -137,6 +142,7 @@ const Map<String, String> bankNames = {
   '90616': 'Finamex',
   '90634': 'Fincomun',
   '90689': 'Fomped',
+  '90699': 'Fondeadora',
   '90685': 'Fondo (Fira)',
   '90601': 'Gbm',
   '37168': 'Hipotecaria Fed',
@@ -149,9 +155,11 @@ const Map<String, String> bankNames = {
   '90686': 'Invercap',
   '40059': 'Invex',
   '40110': 'JP Morgan',
+  '90661': 'KLAR',
   '90653': 'Kuspit',
   '90670': 'Libertad',
   '90602': 'Masari',
+  '90722': 'Mercado Pago W',
   '40042': 'Mifel',
   '40158': 'Mizuho Bank',
   '90600': 'Monexcb',
@@ -161,16 +169,17 @@ const Map<String, String> bankNames = {
   '37135': 'Nafin',
   '90638': 'NU MEXICO',
   '90710': 'NVIO',
-  '90684': 'Opm',
   '40148': 'Pagatodo',
   '90620': 'Profuturo',
   '40156': 'Sabadell',
   '40014': 'Santander',
   '40044': 'Scotiabank',
   '40157': 'Shinhan',
+  '90728': 'Spin by OXXO',
   '90646': 'STP',
   '90648': 'Tactiv Cb',
   '90703': 'Tesored',
+  '90684': 'Transfer',
   '90656': 'Unagra',
   '90617': 'Valmex',
   '90605': 'Value',
diff --git a/lib/src/clabe_validation.dart b/lib/src/clabe_validation.dart
index fc1d4bf..2a976da 100644
--- a/lib/src/clabe_validation.dart
+++ b/lib/src/clabe_validation.dart
@@ -37,8 +37,10 @@ String getBankName(String clabe) {
     https://es.wikipedia.org/wiki/CLABE#D.C3.ADgito_control
   */
   String code = clabe.substring(0, 3);
-  String bank = bankNames[banks[code]];
-
+  final bankCode = banks[code];
+  if (bankCode == null) throw Exception('Ningún banco tiene código ${code}');
+  final bank = bankNames[bankCode];
   if (bank == null) throw Exception('Ningún banco tiene código ${code}');
+
   return bank;
 }
diff --git a/lib/src/validations.dart b/lib/src/validations.dart
index 113a187..ba34375 100644
--- a/lib/src/validations.dart
+++ b/lib/src/validations.dart
@@ -1,5 +1,5 @@
 // Determine if a String is digit
-bool isDigit(String s) {
+bool isDigit(String? s) {
   if (s == null) {
     return false;
   }
diff --git a/pubspec.yaml b/pubspec.yaml
index 891a280..916848b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,11 +1,10 @@
 name: clabe_dart
 description: Validate a CLABE (Clave Bancaria Estandarizada), calculate the control digit and get the name of the bank.
-version: 1.1.6
-author: Cuenca <dev@cuenca.com>
+version: 1.2.0
 homepage: https://github.com/cuenca-mx/clabe-dart
 
 environment:
-  sdk: '>=2.0.0 <3.0.0'
+  sdk: ">=3.3.4 <4.0.0"
 
 #dependencies:
 
diff --git a/test/clabe_test.dart b/test/clabe_test.dart
index acdbb33..5de9347 100644
--- a/test/clabe_test.dart
+++ b/test/clabe_test.dart
@@ -3,9 +3,10 @@ import 'package:test/test.dart';
 import 'package:clabe_dart/clabe_dart.dart';
 
 void main() {
-  String VALID_CLABE;
-  String INVALID_CLABE;
-  String INVALID_CLABE_BANK_CODE;
+  late String VALID_CLABE;
+  late String INVALID_CLABE;
+  late String INVALID_CLABE_BANK_CODE;
+
   setUp(() {
     VALID_CLABE = '002000000000000008';
     INVALID_CLABE = '002000000000000007';