diff --git a/mail_attach_existing_attachment/README.rst b/mail_attach_existing_attachment/README.rst
index 50784be0..d81fb587 100644
--- a/mail_attach_existing_attachment/README.rst
+++ b/mail_attach_existing_attachment/README.rst
@@ -31,7 +31,7 @@ To configure 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/205/8.0
+   :target: https://runbot.odoo-community.org/runbot/205/9.0
 
 Known issues / Roadmap
 ======================
@@ -41,10 +41,10 @@ Known issues / Roadmap
 Bug Tracker
 ===========
 
-Bugs are tracked on `GitHub Issues <https://github.com/OCA/social/issues>`_.
-In case of trouble, please check there if your issue has already been reported.
-If you spotted it first, help us smashing it by providing a detailed and welcomed feedback
-`here <https://github.com/OCA/social/issues/new?body=module:%20mail_attach_existing_attachment%0Aversion:%208.0%0A%0A**Steps%20to%20reproduce**%0A-%20...%0A%0A**Current%20behavior**%0A%0A**Expected%20behavior**>`_.
+Bugs are tracked on `GitHub Issues
+<https://github.com/OCA/social/issues>`_. In case of trouble, please
+check there if your issue has already been reported. If you spotted it first,
+help us smashing it by providing a detailed and welcomed feedback.
 
 Credits
 =======
@@ -53,6 +53,7 @@ Contributors
 ------------
 
 * Adrien Peiffer <adrien.peiffer@acsone.eu>
+* Sergio Teruel <sergio.teruel@tecnativa.com>
 
 Maintainer
 ----------
@@ -65,4 +66,4 @@ This module is maintained by the OCA.
 
 OCA, or the Odoo Community Association, is a nonprofit organization whose mission is to support the collaborative development of Odoo features and promote its widespread use.
 
-To contribute to this module, please visit http://odoo-community.org.
\ No newline at end of file
+To contribute to this module, please visit http://odoo-community.org.
diff --git a/mail_attach_existing_attachment/__openerp__.py b/mail_attach_existing_attachment/__openerp__.py
index 2e5f1c74..58f1642d 100644
--- a/mail_attach_existing_attachment/__openerp__.py
+++ b/mail_attach_existing_attachment/__openerp__.py
@@ -26,10 +26,12 @@
     'name': "Mail Attach Existing Attachment",
     'summary': """
         Adding attachment on the object by sending this one""",
-    'author': "ACSONE SA/NV,Odoo Community Association (OCA)",
+    'author': "ACSONE SA/NV,"
+              "Tecnativa,"
+              "Odoo Community Association (OCA)",
     'website': "http://acsone.eu",
     'category': 'Social Network',
-    'version': '8.0.1.0.0',
+    'version': '9.0.1.0.0',
     'license': 'AGPL-3',
     'depends': [
         'mail',
@@ -38,5 +40,5 @@
     'data': [
         'wizard/mail_compose_message_view.xml',
     ],
-    'installable': False,
+    'installable': True,
 }
diff --git a/mail_attach_existing_attachment/static/description/icon.png b/mail_attach_existing_attachment/static/description/icon.png
new file mode 100644
index 00000000..0b6c4d89
Binary files /dev/null and b/mail_attach_existing_attachment/static/description/icon.png differ
diff --git a/mail_attach_existing_attachment/tests/test_mail_attach_existing_attachment.py b/mail_attach_existing_attachment/tests/test_mail_attach_existing_attachment.py
index eed39bc3..af1aaaec 100644
--- a/mail_attach_existing_attachment/tests/test_mail_attach_existing_attachment.py
+++ b/mail_attach_existing_attachment/tests/test_mail_attach_existing_attachment.py
@@ -44,6 +44,6 @@ class TestAttachExistingAttachment(common.TransactionCase):
                 'object_attachment_ids': [(6, 0, [attach1.id])]
                 }
         mail = self.env['mail.compose.message'].create(vals)
-        values = mail.get_mail_values(mail, [self.partner_01.id])
+        values = mail.get_mail_values([self.partner_01.id])
         self.assertTrue(attach1.id in
                         values[self.partner_01.id]['attachment_ids'])
diff --git a/mail_attach_existing_attachment/wizard/mail_compose_message.py b/mail_attach_existing_attachment/wizard/mail_compose_message.py
index 4c7d43f3..6e154a14 100644
--- a/mail_attach_existing_attachment/wizard/mail_compose_message.py
+++ b/mail_attach_existing_attachment/wizard/mail_compose_message.py
@@ -35,7 +35,7 @@ class MailComposeMessage(models.TransientModel):
         if res.get('res_id') and res.get('model') and \
                 res.get('composition_mode', '') != 'mass_mail' and\
                 not res.get('can_attach_attachment'):
-            res['can_attach_attachment'] = True
+            res['can_attach_attachment'] = True  # pragma: no cover
         return res
 
     can_attach_attachment = fields.Boolean(string='Can Attach Attachment')
@@ -44,14 +44,10 @@ class MailComposeMessage(models.TransientModel):
         relation='mail_compose_message_ir_attachments_object_rel',
         column1='wizard_id', column2='attachment_id', string='Attachments')
 
-    @api.model
-    def get_mail_values(self, wizard, res_ids):
-        res = super(MailComposeMessage, self).get_mail_values(wizard, res_ids)
-        if wizard.object_attachment_ids.ids and wizard.model and\
-                len(res_ids) == 1:
-            for res_id in res_ids:
-                if not res[res_id].get('attachment_ids'):
-                    res[res_id]['attachment_ids'] = []
-                res[res_id]['attachment_ids'].extend(
-                    wizard.object_attachment_ids.ids)
+    @api.multi
+    def get_mail_values(self, res_ids):
+        res = super(MailComposeMessage, self).get_mail_values(res_ids)
+        if self.object_attachment_ids.ids and self.model and len(res_ids) == 1:
+            res[res_ids[0]].setdefault('attachment_ids', []).extend(
+                self.object_attachment_ids.ids)
         return res