diff --git a/.travis.yml b/.travis.yml
index 920422fe..dbe10d4c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,6 @@
+sudo: false
+cache: pip
+
addons:
apt:
packages:
diff --git a/document_page/document_page.py b/document_page/document_page.py
index 57e6d050..21da2770 100644
--- a/document_page/document_page.py
+++ b/document_page/document_page.py
@@ -27,6 +27,7 @@ _logger = logging.getLogger(__name__)
class document_page(models.Model):
_name = "document.page"
+ _inherit = ['mail.thread']
_description = "Document Page"
_order = 'name'
diff --git a/document_page/document_page_view.xml b/document_page/document_page_view.xml
index abf2aea3..7f7ab50d 100644
--- a/document_page/document_page_view.xml
+++ b/document_page/document_page_view.xml
@@ -44,39 +44,58 @@