diff --git a/doc/getting_started/plugins.rst b/doc/getting_started/plugins.rst
index ccfdd7374..dc68888d7 100644
--- a/doc/getting_started/plugins.rst
+++ b/doc/getting_started/plugins.rst
@@ -75,6 +75,12 @@ database. Inside *settings.py*, add a new connection to the
 
 Replace values between ``<>`` with yours.
 
+.. note::
+
+   Modoboa doesn't create *amavis* tables. You need to install them
+   following the `official documentation
+   <http://www.amavis.org/#doc>`_.
+
 Cleanup
 -------
 
diff --git a/doc/getting_started/upgrade.rst b/doc/getting_started/upgrade.rst
index 8ca88c922..bd49c6b6f 100644
--- a/doc/getting_started/upgrade.rst
+++ b/doc/getting_started/upgrade.rst
@@ -27,7 +27,7 @@ Then, follow the common procedure::
 
   $ cd <modoboa_instance_dir>
   $ python manage.py syncdb --migrate
-  $ python collectstatic
+  $ python manage.py collectstatic
 
 Finally, refer to this page to see if the version you're installing
 requires specific operations.