diff --git a/doc/integration/web_servers.rst b/doc/integration/web_servers.rst
index 2c2d11185..eef79b526 100644
--- a/doc/integration/web_servers.rst
+++ b/doc/integration/web_servers.rst
@@ -107,19 +107,21 @@ Nginx
    possible that **your** installation of uwsgi or nginx or Apache or
    what-have-you works differently. Keep this in mind.
 
+This section covers two different ways of running Modoboa behind
+`Nginx <http://nginx.org/>`_ using a WSGI application server. Choose
+the one you prefer between `Green Unicorn <http://gunicorn.org/>`_ or
+`uWSGI <https://github.com/unbit/uwsgi>`_.
+
+In both cases, you'll need to download and `install nginx
+<http://wiki.nginx.org/Install>`_.
+
 Green Unicorn
 =============
 
-`Nginx <http://nginx.org/>`_ is a really fast HTTP server. Associated
-with `Green Unicorn <http://gunicorn.org/>`_, it gives you one of the
-best setups to serve python/Django applications. Modoboa's
-performance is really good with this configuration.
-
-To use this setup, first download and install `nginx
-<http://wiki.nginx.org/Install>`__ and `gunicorn
+Firstly, `Download and install gunicorn
 <http://gunicorn.org/install.html>`_. Then, use the following sample
-gunicorn configuration (create a new file named :file:`gunicorn.conf.py`
-inside Modoboa's root dir)::
+gunicorn configuration (create a new file named
+:file:`gunicorn.conf.py` inside Modoboa's root dir)::
 
   backlog = 2048
   bind = "unix:/var/run/gunicorn/modoboa.sock"
@@ -191,7 +193,7 @@ Paste this content to your configuration (replace values between
 ``<>`` with yours), restart nginx and enjoy a really fast
 application!
 
-uwsgi
+uWSGI
 =====
 
 The following setup is meant to get you started quickly. You should
@@ -213,8 +215,7 @@ uwsgi:
 Use uwsgi 1.2.6 or newer. If you do not, you *will* run into
 problems. Modoboa will fail in obscure ways.
 
-To use this setup, first download and install `nginx
-<http://wiki.nginx.org/Install>`__ and `uwsgi
+To use this setup, first `download and install uwsgi
 <http://uwsgi-docs.readthedocs.org/en/latest/WSGIquickstart.html>`_.
 
 Here is a sample nginx configuration::
@@ -256,11 +257,14 @@ Here is a sample nginx configuration::
         location <modoba's root url>/ {
             include uwsgi_params;
             uwsgi_pass <uwsgi port>;
-            uwsgi_param UWSGI_SCRIPT modoboa_server.wsgi:application
+            uwsgi_param UWSGI_SCRIPT <modoboa instance name>.wsgi:application
             uwsgi_param UWSGI_SCHEME https;
         }
     }
 
+``<modoboa instance name>`` must be replaced by the value you used
+when :ref:`you deployed your instance <deployment>`.
+
 If you do not plan to use SSL then change the listen directive to
 ``listen 80;`` and delete each of the following directives::
 
@@ -272,7 +276,7 @@ If you do not plan to use SSL then change the listen directive to
 
 If you do plan to use SSL, you'll have to generate a certificate and a
 key. `This article
-<http://wiki.nginx.org/HttpSslModule#Generate_Certificates>`__
+<http://wiki.nginx.org/HttpSslModule#Generate_Certificates>`_
 contains information about how to do it.
 
 Make sure to replace the ``<...>`` in the sample configuration with
diff --git a/modoboa/core/management/commands/cleanlogs.py b/modoboa/core/management/commands/cleanlogs.py
index 0cf1c8aac..59f3859d9 100644
--- a/modoboa/core/management/commands/cleanlogs.py
+++ b/modoboa/core/management/commands/cleanlogs.py
@@ -2,6 +2,7 @@
 # coding: utf-8
 import datetime
 from optparse import make_option
+from django import db
 from django.core.management.base import BaseCommand
 from django.utils import timezone
 from modoboa.core import load_core_settings
@@ -42,4 +43,5 @@ class Command(BaseCommand):
         self.__vprint("Deleting logs older than %d days..." % log_maximum_age)
         limit = timezone.now() - datetime.timedelta(log_maximum_age)
         Log.objects.filter(date_created__lt=limit).delete()
+        db.close_connection()
         self.__vprint("Done.")
diff --git a/modoboa/extensions/admin/management/commands/handle_mailbox_operations.py b/modoboa/extensions/admin/management/commands/handle_mailbox_operations.py
index 056b4a55e..e282fb1c6 100644
--- a/modoboa/extensions/admin/management/commands/handle_mailbox_operations.py
+++ b/modoboa/extensions/admin/management/commands/handle_mailbox_operations.py
@@ -1,6 +1,7 @@
 import os
 import logging
 from optparse import make_option
+from django import db
 from django.core.management.base import BaseCommand
 from modoboa.lib import parameters
 from modoboa.lib.sysutils import exec_cmd
@@ -90,3 +91,4 @@ class Command(BaseCommand):
                 self.logger.info('%s succeed', ope)
                 ope.delete()
         os.unlink(options['pidfile'])
+        db.close_connection()
diff --git a/modoboa/extensions/amavis/management/commands/amnotify.py b/modoboa/extensions/amavis/management/commands/amnotify.py
index 1ede77c6e..54846b12e 100644
--- a/modoboa/extensions/amavis/management/commands/amnotify.py
+++ b/modoboa/extensions/amavis/management/commands/amnotify.py
@@ -1,6 +1,7 @@
 #!/usr/bin/env python
 # coding: utf-8
 from optparse import make_option
+from django import db
 from django.core.management.base import BaseCommand, CommandError
 from django.template.loader import render_to_string
 from django.core.urlresolvers import reverse
@@ -90,3 +91,4 @@ class Command(BaseCommand):
                 continue
             rcpt = su.mailbox_set.all()[0].full_address
             self.send_pr_notification(rcpt, reqs)
+        db.close_connection()
diff --git a/modoboa/extensions/amavis/management/commands/qcleanup.py b/modoboa/extensions/amavis/management/commands/qcleanup.py
index c31d348f5..a1be4a32d 100644
--- a/modoboa/extensions/amavis/management/commands/qcleanup.py
+++ b/modoboa/extensions/amavis/management/commands/qcleanup.py
@@ -3,6 +3,7 @@
 
 import time
 from optparse import make_option
+from django import db
 from django.core.management.base import BaseCommand
 from modoboa.lib import parameters
 from modoboa.extensions.amavis import Amavis
@@ -63,5 +64,6 @@ class Command(BaseCommand):
         for maddr in Maddr.objects.all():
             if not maddr.msgs_set.count() and not maddr.msgrcpt_set.count():
                 maddr.delete()
+        db.close_connection()
 
         self.__vprint("Done.")
diff --git a/modoboa/extensions/postfix_autoreply/management/commands/autoreply.py b/modoboa/extensions/postfix_autoreply/management/commands/autoreply.py
index 3118f6cc9..f91645a4e 100644
--- a/modoboa/extensions/postfix_autoreply/management/commands/autoreply.py
+++ b/modoboa/extensions/postfix_autoreply/management/commands/autoreply.py
@@ -2,6 +2,7 @@
 # coding: utf-8
 import sys
 import datetime
+from django import db
 from django.core.management.base import BaseCommand, CommandError
 from django.utils import timezone
 from modoboa.lib import parameters
@@ -64,3 +65,4 @@ class Command(BaseCommand):
                 continue
 
             send_autoreply(sender, mbox, armessage)
+        db.close_connection()
diff --git a/modoboa/extensions/stats/management/commands/logparser.py b/modoboa/extensions/stats/management/commands/logparser.py
index e0935164b..04c182063 100644
--- a/modoboa/extensions/stats/management/commands/logparser.py
+++ b/modoboa/extensions/stats/management/commands/logparser.py
@@ -23,8 +23,9 @@ import os
 import re
 import rrdtool
 import string
-from django.core.management.base import BaseCommand
 from optparse import make_option
+from django import db
+from django.core.management.base import BaseCommand
 from modoboa.lib import parameters
 from modoboa.extensions.admin.models import Domain
 from modoboa.extensions.stats import Stats
@@ -353,3 +354,4 @@ class Command(BaseCommand):
             options["logfile"] = parameters.get_admin("LOGFILE", app="stats")
         p = LogParser(options, parameters.get_admin("RRD_ROOTDIR", app="stats"))
         p.process()
+        db.close_connection()
diff --git a/requirements.txt b/requirements.txt
index f7521f053..9c7b48790 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 django>=1.5,<1.6
-django-reversion>=1.8.0
+django-reversion==1.8.0
 dj-database-url
 south
 lxml