diff --git a/partner_ref_unique/README.rst b/partner_ref_unique/README.rst
index e4a903827..8ee806ba5 100644
--- a/partner_ref_unique/README.rst
+++ b/partner_ref_unique/README.rst
@@ -19,7 +19,7 @@ To use this module, you need to:
 
 .. image:: https://odoo-community.org/website/image/ir.attachment/5784_f2813bd/datas
    :alt: Try me on Runbot
-   :target: https://runbot.odoo-community.org/runbot/134/9.0
+   :target: https://runbot.odoo-community.org/runbot/134/11.0
 
 Bug Tracker
 ===========
diff --git a/partner_ref_unique/__init__.py b/partner_ref_unique/__init__.py
index 5a5c25ccb..83e553ac4 100644
--- a/partner_ref_unique/__init__.py
+++ b/partner_ref_unique/__init__.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-# Copyright 2016 Antiun Ingenieria S.L. - Antonio Espinosa
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
 from . import models
diff --git a/partner_ref_unique/__openerp__.py b/partner_ref_unique/__manifest__.py
similarity index 77%
rename from partner_ref_unique/__openerp__.py
rename to partner_ref_unique/__manifest__.py
index 0b8490f6f..b75c8dfb1 100644
--- a/partner_ref_unique/__openerp__.py
+++ b/partner_ref_unique/__manifest__.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Copyright 2016 Antiun Ingenieria S.L. - Antonio Espinosa
 # Copyright 2017 Tecnativa - Vicent Cubells
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
@@ -6,11 +5,10 @@
 {
     "name": "Partner unique reference",
     "summary": "Add an unique constraint to partner ref field",
-    "version": "9.0.1.0.0",
+    "version": "11.0.1.0.0",
     "category": "Customer Relationship Management",
-    "website": "http://www.antiun.com",
-    "author": "Antiun Ingeniería S.L., "
-              "Tecnativa, "
+    "website": "https://github.com/OCA/partner-contact/",
+    "author": "Tecnativa, "
               "Odoo Community Association (OCA)",
     "license": "AGPL-3",
     "application": False,
diff --git a/partner_ref_unique/models/__init__.py b/partner_ref_unique/models/__init__.py
index f33d10808..f84abb8e9 100644
--- a/partner_ref_unique/models/__init__.py
+++ b/partner_ref_unique/models/__init__.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-# Copyright 2016 Antiun Ingenieria S.L. - Antonio Espinosa
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
 from . import res_company
diff --git a/partner_ref_unique/models/res_company.py b/partner_ref_unique/models/res_company.py
index 0cae5c203..4537424d1 100644
--- a/partner_ref_unique/models/res_company.py
+++ b/partner_ref_unique/models/res_company.py
@@ -1,8 +1,7 @@
-# -*- coding: utf-8 -*-
-# Copyright 2016 Antiun Ingenieria S.L. - Antonio Espinosa
+# Copyright 2016 Antonio Espinosa
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
-from openerp import models, fields
+from odoo import fields, models
 
 
 class ResCompany(models.Model):
diff --git a/partner_ref_unique/models/res_partner.py b/partner_ref_unique/models/res_partner.py
index 14adeb0e6..c7fc7af23 100644
--- a/partner_ref_unique/models/res_partner.py
+++ b/partner_ref_unique/models/res_partner.py
@@ -1,9 +1,8 @@
-# -*- coding: utf-8 -*-
-# Copyright 2016 Antiun Ingenieria S.L. - Antonio Espinosa
+# Copyright 2016 Antonio Espinosa
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
-from openerp import models, api, _
-from openerp.exceptions import ValidationError
+from odoo import _, api, models
+from odoo.exceptions import ValidationError
 
 
 class ResPartner(models.Model):
@@ -20,7 +19,6 @@ class ResPartner(models.Model):
                 domain = [
                     ('id', '!=', partner.id),
                     ('ref', '=', partner.ref),
-                    ('customer', '=', True),
                 ]
                 if mode == 'companies':
                     domain.append(('is_company', '=', True))
diff --git a/partner_ref_unique/readme/CONFIGURE.rst b/partner_ref_unique/readme/CONFIGURE.rst
new file mode 100755
index 000000000..5a93bcb84
--- /dev/null
+++ b/partner_ref_unique/readme/CONFIGURE.rst
@@ -0,0 +1,5 @@
+To configure this module, you need to:
+
+#. Go to **Settings > Companies**.
+#. Select a company.
+#. Choose an option on section *Partners*.
\ No newline at end of file
diff --git a/partner_ref_unique/readme/CONTRIBUTORS.rst b/partner_ref_unique/readme/CONTRIBUTORS.rst
new file mode 100755
index 000000000..c64159a09
--- /dev/null
+++ b/partner_ref_unique/readme/CONTRIBUTORS.rst
@@ -0,0 +1,10 @@
+
+
+* `Tecnativa <https://www.tecnativa.com>`__:
+
+  * Antonio Espinosa
+  * Pedro M. Baeza
+  * Rafael Blasco
+  * Jairo Llopis
+  * Vicent Cubells
+  * Cristina Martín
diff --git a/partner_ref_unique/readme/DESCRIPTION.rst b/partner_ref_unique/readme/DESCRIPTION.rst
new file mode 100755
index 000000000..d3e5b152c
--- /dev/null
+++ b/partner_ref_unique/readme/DESCRIPTION.rst
@@ -0,0 +1 @@
+This module allows add an unique constraint to partner ref field.
\ No newline at end of file
diff --git a/partner_ref_unique/readme/USAGE.rst b/partner_ref_unique/readme/USAGE.rst
new file mode 100755
index 000000000..239792b42
--- /dev/null
+++ b/partner_ref_unique/readme/USAGE.rst
@@ -0,0 +1,6 @@
+#. Go to any partner in **Contacts > Contacts**
+#. Try to create two partners with the same ref.
+
+* If you selcted the option 'All partners' you can't create two partners with the same ref.
+* If you selcted the option 'Only companies' you can't create two companies with the same ref.
+* If you selcted the option 'None' you can create two partners with the same ref.
\ No newline at end of file
diff --git a/partner_ref_unique/tests/__init__.py b/partner_ref_unique/tests/__init__.py
index 00432e6ea..d3f5108ed 100644
--- a/partner_ref_unique/tests/__init__.py
+++ b/partner_ref_unique/tests/__init__.py
@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-# Copyright 2017 Tecnativa - Vicent Cubells
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
 from . import test_res_partner_ref
diff --git a/partner_ref_unique/tests/test_res_partner_ref.py b/partner_ref_unique/tests/test_res_partner_ref.py
index 32ff32e0c..f61ee8682 100644
--- a/partner_ref_unique/tests/test_res_partner_ref.py
+++ b/partner_ref_unique/tests/test_res_partner_ref.py
@@ -1,9 +1,8 @@
-# -*- coding: utf-8 -*-
 # Copyright 2017 Tecnativa - Vicent Cubells
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
-from openerp.tests import common
-from openerp.exceptions import ValidationError
+from odoo.tests import common
+from odoo.exceptions import ValidationError
 
 
 class TestResPartnerRefUnique(common.SavepointCase):
diff --git a/partner_ref_unique/views/res_company_view.xml b/partner_ref_unique/views/res_company_view.xml
index c8cb6f485..4091186bb 100644
--- a/partner_ref_unique/views/res_company_view.xml
+++ b/partner_ref_unique/views/res_company_view.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright 2016 Antiun Ingenieria S.L. - Antonio Espinosa
+<!-- Copyright 2016 Antonio Espinosa
      Copyright 2017 Tecnativa - Vicent Cubells
      License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html). -->
 <odoo>
@@ -9,13 +9,11 @@
     <field name="model">res.company</field>
     <field name="inherit_id" ref="base.view_company_form"/>
     <field name="arch" type="xml">
-        <page name="configuration" position="inside">
-            <group>
-                <group name="partner" string="Partners">
-                    <field name="partner_ref_unique"/>
-                </group>
+        <group name="social_media" position="before">
+            <group name="partner" string="Partners">
+                <field name="partner_ref_unique"/>
             </group>
-        </page>
+        </group>
     </field>
 </record>