diff --git a/.travis.yml b/.travis.yml
index 247e8522a..1b06c1b61 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,7 @@
 sudo: false
 
 addons:
+  postgresql: "9.4"
   apt:
     packages:
       - expect-dev  # provides unbuffer utility
diff --git a/magentoerpconnect/README.rst b/magentoerpconnect/README.rst
index 554529513..8e353b0f1 100644
--- a/magentoerpconnect/README.rst
+++ b/magentoerpconnect/README.rst
@@ -65,8 +65,6 @@ Technical points:
 
 .. _connector: https://github.com/OCA/connector
 .. _connector_ecommerce: https://github.com/OCA/connector-ecommerce
-.. _Camptocamp: http://www.camptocamp.com
-.. _Akretion: http://www.akretion.com
 .. _`source is on GitHub`: https://github.com/OCA/connector-magento
 
 Installation
diff --git a/magentoerpconnect/delivery.py b/magentoerpconnect/delivery.py
index 5c41c4b4f..5799486a8 100644
--- a/magentoerpconnect/delivery.py
+++ b/magentoerpconnect/delivery.py
@@ -71,4 +71,5 @@ class DeliveryCarrier(models.Model):
     def _compute_carrier_code(self):
         for carrier in self:
             if carrier.magento_code:
-                self.magento_carrier_code = carrier.magento_code.split('_')[0]
+                carrier.magento_carrier_code = carrier.magento_code.split(
+                    '_')[0]