diff --git a/kfet/consumers.py b/kfet/consumers.py
index dcd69bdf..ee096368 100644
--- a/kfet/consumers.py
+++ b/kfet/consumers.py
@@ -1,26 +1,41 @@
 # -*- coding: utf-8 -*-
 
-from __future__ import (absolute_import, division,
-                        print_function, unicode_literals)
-from builtins import *
+from django.core.serializers.json import json, DjangoJSONEncoder
 
-from channels import Group
 from channels.generic.websockets import JsonWebsocketConsumer
 
-class KPsul(JsonWebsocketConsumer):
 
-    # Set to True if you want them, else leave out
-    strict_ordering = False
-    slight_ordering = False
+class DjangoJsonWebsocketConsumer(JsonWebsocketConsumer):
+    """Custom Json Websocket Consumer.
 
-    def connection_groups(self, **kwargs):
-        return ['kfet.kpsul']
+    Encode to JSON with DjangoJSONEncoder.
+
+    """
+
+    @classmethod
+    def encode_json(cls, content):
+        return json.dumps(content, cls=DjangoJSONEncoder)
+
+
+class PermConsumerMixin(object):
+    """Add support to check permissions on Consumers.
+
+    Attributes:
+        perms_connect (list): Required permissions to connect to this
+            consumer.
+
+    """
+    http_user = True  # Enable message.user
+    perms_connect = []
 
     def connect(self, message, **kwargs):
-        pass
+        """Check permissions on connection."""
+        if message.user.has_perms(self.perms_connect):
+            super().connect(message, **kwargs)
+        else:
+            self.close()
 
-    def receive(self, content, **kwargs):
-        pass
 
-    def disconnect(self, message, **kwargs):
-        pass
+class KPsul(PermConsumerMixin, DjangoJsonWebsocketConsumer):
+    groups = ['kfet.kpsul']
+    perms_connect = ['kfet.is_team']
diff --git a/requirements.txt b/requirements.txt
index b851907e..e3fa1ca2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,13 +12,13 @@ six==1.10.0
 unicodecsv==0.14.1
 icalendar==3.10
 django-bootstrap-form==3.2.1
-asgiref==0.14.0
-daphne==0.14.3
-asgi-redis==0.14.0
+asgiref==1.1.1
+daphne==1.2.0
+asgi-redis==1.3.0
 statistics==1.0.3.5
 future==0.15.2
 django-widget-tweaks==1.4.1
 git+https://git.eleves.ens.fr/cof-geek/django_custommail.git#egg=django_custommail
 ldap3
-git+https://github.com/Aureplop/channels.git#egg=channels
+channels==1.1.3
 python-dateutil