diff --git a/delivery_partner_dhl/__manifest__.py b/delivery_partner_dhl/__manifest__.py
index 26f40db0..439d5e5a 100755
--- a/delivery_partner_dhl/__manifest__.py
+++ b/delivery_partner_dhl/__manifest__.py
@@ -1,7 +1,7 @@
 {
     'name': 'DHL Partner Shipping Accounts',
     'author': 'Hibou Corp. <hello@hibou.io>',
-    'version': '11.0.1.0.0',
+    'version': '12.0.1.0.0',
     'category': 'Stock',
     'sequence': 95,
     'summary': 'DHL Partner Shipping Accounts',
diff --git a/delivery_partner_dhl/models/delivery.py b/delivery_partner_dhl/models/delivery.py
index ceb51651..db975f51 100644
--- a/delivery_partner_dhl/models/delivery.py
+++ b/delivery_partner_dhl/models/delivery.py
@@ -10,7 +10,7 @@ class PartnerShippingAccount(models.Model):
     delivery_type = fields.Selection(selection_add=[('dhl', 'DHL')])
 
     def dhl_check_validity(self):
-        m = re.search('^\d{10}$', self.name or '')
+        m = re.search(r'^\d{10}$', self.name or '')
         if not m:
             raise ValidationError('DHL Account numbers must be 10 decimal numbers.')