diff --git a/source/app/controllers/util.py b/source/app/controllers/util.py
index d27c90f..ee5238e 100644
--- a/source/app/controllers/util.py
+++ b/source/app/controllers/util.py
@@ -82,6 +82,7 @@ from settings import (
     EXT,
     MXN,
     PATHS,
+    PRE_DEFAULT,
 )
 
 
@@ -2111,25 +2112,53 @@ def _nomina(doc, data, values, version_cfdi):
     return info
 
 
+def _get_info_pays_2(node):
+    pre_pays = PRE_DEFAULT['PAGOS']['PRE']
+    data = CaseInsensitiveDict(node.attrib.copy())
+
+    path = f"{pre_pays}Totales"
+    totales = node.find(path)
+    data.update(CaseInsensitiveDict(totales.attrib.copy()))
+
+    path = f"{pre_pays}Pago"
+    node_pay = node.find(path)
+    data.update(CaseInsensitiveDict(node_pay.attrib.copy()))
+
+    related = []
+    for n in node_pay:
+        attr = CaseInsensitiveDict(n.attrib.copy())
+        if attr:
+            attr['metododepagodr'] = ''
+            related.append(attr)
+
+    data['related'] = related
+
+    return data
+
+
 def _cfdipays(doc, data, version):
     #todo: Obtener versión de complemento
     if version == '4.0':
-        node = doc.find(f"{PRE[version]}Complemento/{PRE['pagos20']}Pagos")
+        pre_pays = PRE_DEFAULT['PAGOS']['PRE']
+        path = f"{PRE[version]}Complemento/{pre_pays}Pagos"
+        node = doc.find(path)
     else:
         node = doc.find('{}Complemento/{}Pagos'.format(PRE[version], PRE['pagos']))
 
     if node is None:
         return {}
 
-    info = CaseInsensitiveDict(node.attrib.copy())
+    if version == '4.0':
+        info = _get_info_pays_2(node)
+    else:
+        info = CaseInsensitiveDict(node.attrib.copy())
+        related = []
+        for n1 in node:
+            info.update(CaseInsensitiveDict(n1.attrib.copy()))
+            for n2 in n1:
+                related.append(CaseInsensitiveDict(n2.attrib.copy()))
 
-    related = []
-    for n1 in node:
-        info.update(CaseInsensitiveDict(n1.attrib.copy()))
-        for n2 in n1:
-            related.append(CaseInsensitiveDict(n2.attrib.copy()))
-
-    info['related'] = related
+        info['related'] = related
 
     data['comprobante']['totalenletras'] = to_letters(
         float(info['monto']), info['monedap'])
diff --git a/source/app/models/main.py b/source/app/models/main.py
index 4168a10..4a51ce2 100644
--- a/source/app/models/main.py
+++ b/source/app/models/main.py
@@ -32,9 +32,9 @@ if __name__ == '__main__':
 
 from controllers import util
 
-from settings import log, COMPANIES, VERSION, PATH_CP, PRE, CURRENT_CFDI, \
+from settings import log, COMPANIES, VERSION, PATH_CP, PRE, \
     INIT_VALUES, DEFAULT_PASSWORD, DECIMALES, IMPUESTOS, DEFAULT_SAT_PRODUCTO, \
-    CANCEL_SIGNATURE, PUBLIC, DEFAULT_SERIE_TICKET, CURRENT_CFDI_NOMINA, \
+    CANCEL_SIGNATURE, PUBLIC, DEFAULT_SERIE_TICKET, \
     DEFAULT_SAT_NOMINA, DECIMALES_TAX, TITLE_APP, MV, DECIMALES_PRECIOS, \
     DEFAULT_CFDIPAY, CURRENCY_MN
 
@@ -50,6 +50,7 @@ from settings import (
     IS_MV,
     MXN,
     PATHS,
+    PRE_DEFAULT,
     URL,
     VALUES_PDF,
     VERSION as VERSION_EMPRESA_LIBRE,
@@ -4441,7 +4442,7 @@ class RangosPrecios(BaseModel):
 
 class Facturas(BaseModel):
     cliente = ForeignKeyField(Socios)
-    version = TextField(default=CURRENT_CFDI)
+    version = TextField(default=PRE_DEFAULT['CFDI']['VERSION'])
     serie = TextField(default='')
     folio = BigIntegerField(default=0)
     fecha = DateTimeField(default=util.now, formats=['%Y-%m-%d %H:%M:%S'])
@@ -6575,7 +6576,7 @@ class PreFacturas(BaseModel):
         }
 
         data['comprobante'] = obj
-        data['comprobante']['version'] = CURRENT_CFDI
+        data['comprobante']['version'] = PRE_DEFAULT['CFDI']['VERSION']
         data['comprobante']['folio'] = str(data['comprobante']['folio'])
         data['comprobante']['seriefolio'] = '{}-{}'.format(
             data['comprobante']['serie'], data['comprobante']['folio'])
@@ -9034,7 +9035,7 @@ class Empleados(BaseModel):
 
 class CfdiNomina(BaseModel):
     empleado = ForeignKeyField(Empleados)
-    version = TextField(default=CURRENT_CFDI)
+    version = TextField(default=PRE_DEFAULT['CFDI']['VERSION'])
     serie = TextField(default='N')
     folio = IntegerField(default=0)
     fecha = DateTimeField(default=util.now, formats=['%Y-%m-%d %H:%M:%S'])
@@ -9075,7 +9076,7 @@ class CfdiNomina(BaseModel):
     acuse = TextField(default='')
     tipo_relacion = TextField(default='')
     error = TextField(default='')
-    version_nomina = TextField(default=CURRENT_CFDI_NOMINA)
+    version_nomina = TextField(default=PRE_DEFAULT['NOMINA']['VERSION'])
     registro_patronal = TextField(default='')
     rfc_patron_origen = TextField(default='')
     tipo_nomina = ForeignKeyField(SATTipoNomina)
diff --git a/source/app/settings.py b/source/app/settings.py
index 87725fb..986f01f 100644
--- a/source/app/settings.py
+++ b/source/app/settings.py
@@ -128,6 +128,22 @@ if 'win' in sys.platform:
     PATH_XMLSEC = os.path.join(PATH_BIN, 'xmlsec.exe')
 
 
+PRE_DEFAULT = {
+    'CFDI': {'VERSION': '4.0', 'PRE': '{http://www.sat.gob.mx/cfd/4}'},
+    'NOMINA': {'VERSION': '1.2', 'PRE': '{http://www.sat.gob.mx/nomina12}'},
+    'PAGOS': {'VERSION': '2.0', 'PRE': '{http://www.sat.gob.mx/Pagos20}'},
+    'TIBRE': {'VERSION': '1.1', 'PRE': '{http://www.sat.gob.mx/TimbreFiscalDigital}'},
+}
+
+pre2 ='{http://www.sat.gob.mx/cfd/2}'
+pre3 ='{http://www.sat.gob.mx/cfd/3}'
+PRE_HISTORY = {
+    'CFDI': {'2.0': pre2, '2.2': pre2,
+        '3.0': pre3, '3.2': pre3, '3.3': pre3},
+    'NOMINA': {'1.1': '{http://www.sat.gob.mx/nomina}'},
+    'PAGOS': {'1.0': '{http://www.sat.gob.mx/Pagos}'},
+}
+
 PRE = {
     '2.0': '{http://www.sat.gob.mx/cfd/2}',
     '2.2': '{http://www.sat.gob.mx/cfd/2}',
@@ -141,14 +157,16 @@ PRE = {
     'LOCALES': '{http://www.sat.gob.mx/implocal}',
     'NOMINA': {
         '1.1': '{http://www.sat.gob.mx/nomina}',
-        '1.2': '{http://www.sat.gob.mx/nomina12}',
         },
-    'pagos': '{http://www.sat.gob.mx/Pagos}',
-    'pagos20': '{http://www.sat.gob.mx/Pagos20}',
+    'PAGOS': {
+        '1.0': '{http://www.sat.gob.mx/Pagos}',
+    }
 }
 
-CURRENT_CFDI = '3.3'
-CURRENT_CFDI_NOMINA = '1.2'
+# To delete
+# ~ CURRENT_CFDI = '4.0'
+# ~ CURRENT_CFDI_NOMINA = '1.2'
+
 DECIMALES = 2
 DECIMALES_TAX = 4
 DECIMALES_PRECIOS = 4