diff --git a/CHANGELOG.md b/CHANGELOG.md
index b3134fc..121d708 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-v 1.43.0 [05-Dic-2021]
+v 1.43.0 [12-Dic-2021]
 ----------------------
     - Soporte para entradas de almacen.
     - Soporte para multi almacen.
diff --git a/source/app/controllers/utils.py b/source/app/controllers/utils.py
index c8ff49c..0a8f147 100644
--- a/source/app/controllers/utils.py
+++ b/source/app/controllers/utils.py
@@ -682,7 +682,7 @@ def _cancel_with_cert(invoice, auth, certificado):
 
 
 def cancel_xml_sign(invoice, auth, certificado):
-    # ~ return _cancel_with_cert(invoice, auth, certificado)
+    return _cancel_with_cert(invoice, auth, certificado)
 
     cert = SATCertificate(certificado.cer, certificado.key_enc.encode())
     pac = PACS[auth['pac']]()
diff --git a/source/app/models/main.py b/source/app/models/main.py
index 8a8046d..8e725a6 100644
--- a/source/app/models/main.py
+++ b/source/app/models/main.py
@@ -42,6 +42,7 @@ from settings import log, COMPANIES, VERSION, PATH_CP, PRE, CURRENT_CFDI, \
 from controllers import utils
 from settings import (
     DEBUG,
+    CANCEL_VERSION,
     DEFAULT_GLOBAL,
     DB_COMPANIES,
     EXT,
@@ -4318,8 +4319,8 @@ class Facturas(BaseModel):
 
     @classmethod
     def _cancel_xml_sign(cls, invoice):
-        if invoice.version != '3.3':
-            msg = 'Solo es posible cancelar CFDI 3.3'
+        if not invoice.version in CANCEL_VERSION:
+            msg = 'Solo es posible cancelar CFDI >= 3.3'
             return {'ok': False, 'msg': msg}
 
         pac = utils.get_pac_by_rfc(invoice.xml)
@@ -4361,8 +4362,8 @@ class Facturas(BaseModel):
             obj.estatus = 'Cancelada'
             obj.error = ''
             obj.cancelada = True
-            obj.fecha_cancelacion = result['Fecha']
-            obj.acuse = result['Acuse'] or ''
+            obj.fecha_cancelacion = result['date']
+            obj.acuse = result['acuse'] or ''
             self._actualizar_saldo_cliente(self, obj, True)
             self._update_inventory(self, obj, True)
             self._uncancel_tickets(self, obj)
@@ -7026,10 +7027,6 @@ class CfdiPagos(BaseModel):
             data = {'ok': False, 'msg': msg}
             return data
 
-        # ~ auth = Configuracion.get_({'fields': 'pac_auth'})
-        # ~ certificado = Certificado.get(Certificado.es_fiel==False)
-        # ~ result = utils.cancel_xml_sign(last, auth, certificado)
-
         pac = utils.get_pac_by_rfc(last.xml)
         auth = Configuracion.get_({'fields': 'auth_by_pac', 'pac': pac})
 
@@ -7040,7 +7037,7 @@ class CfdiPagos(BaseModel):
             last.estatus = 'Cancelada'
             last.error = ''
             last.cancelada = True
-            last.fecha_cancelacion = result['Fecha']
+            last.fecha_cancelacion = result['date']
         else:
             last.error = result['msg']
         last.save()
@@ -8648,8 +8645,8 @@ class CfdiNomina(BaseModel):
             obj.estatus = 'Cancelado'
             obj.error = ''
             obj.cancelada = True
-            obj.fecha_cancelacion = result['Fecha']
-            obj.acuse = result['Acuse'] or ''
+            obj.fecha_cancelacion = result['date']
+            obj.acuse = result['acuse'] or ''
         else:
             obj.error = result['msg']
         obj.save()
diff --git a/source/app/settings.py b/source/app/settings.py
index 524bc21..be6edf0 100644
--- a/source/app/settings.py
+++ b/source/app/settings.py
@@ -192,6 +192,8 @@ API = 'https://api.empresalibre.net{}'
 CURRENCY_MN = 'MXN'
 
 # ~ v2
+CANCEL_VERSION = ('3.3', '4.0')
+
 IS_MV = MV
 DB_COMPANIES = os.path.abspath(os.path.join(BASE_DIR, '..', 'db', 'rfc.db'))
 path_bk = os.path.join(path_docs, 'tmp')