diff --git a/apps/participation/models.py b/apps/participation/models.py
index 7fc9b67..03bbd58 100644
--- a/apps/participation/models.py
+++ b/apps/participation/models.py
@@ -2,6 +2,7 @@ import os
 import re
 
 from django.template.loader import render_to_string
+from nio import RoomVisibility, RoomPreset
 
 from corres2math.lists import get_sympa_client
 from django.core.exceptions import ObjectDoesNotExist
@@ -14,6 +15,8 @@ from django.utils.crypto import get_random_string
 from django.utils.text import format_lazy
 from django.utils.translation import gettext_lazy as _
 
+from corres2math.matrix import Matrix
+
 
 class Team(models.Model):
     name = models.CharField(
@@ -63,6 +66,13 @@ class Team(models.Model):
             self.access_code = get_random_string(6)
             self.create_mailing_list()
 
+            Matrix.create_room(
+                visibility=RoomVisibility.private,
+                alias=f"team-{self.trigram.lower()}",
+                topic=f"Discussion de l'équipe {self.name}",
+                preset=RoomPreset.private_chat,
+            )
+
         return super().save(*args, **kwargs)
 
     def get_absolute_url(self):
diff --git a/apps/registration/auth.py b/apps/registration/auth.py
index 4014de5..dd993e1 100644
--- a/apps/registration/auth.py
+++ b/apps/registration/auth.py
@@ -10,4 +10,5 @@ class CustomAuthUser(DjangoAuthUser):
         d = super().attributs()
         if self.user:
             d["matrix_username"] = f"corres2math_{self.user.pk}"
+            d["display_name"] = str(self.user.registration)
         return d
diff --git a/apps/registration/fixtures/initial.json b/apps/registration/fixtures/initial.json
index 9cd99b0..40afb61 100644
--- a/apps/registration/fixtures/initial.json
+++ b/apps/registration/fixtures/initial.json
@@ -1,17 +1,17 @@
 [
-{
-    "model": "cas_server.servicepattern",
-    "pk": 1,
-    "fields": {
-        "pos": 100,
-        "name": "Plateforme des Correspondances",
-        "pattern": "^https://correspondances-maths.fr:8448/.*$",
-        "user_field": "matrix_username",
-        "restrict_users": false,
-        "proxy": true,
-        "proxy_callback": true,
-        "single_log_out": true,
-        "single_log_out_callback": ""
+    {
+        "model": "cas_server.servicepattern",
+        "pk": 1,
+        "fields": {
+            "pos": 100,
+            "name": "Plateforme des Correspondances",
+            "pattern": "^https://correspondances-maths.fr:8448/.*$",
+            "user_field": "matrix_username",
+            "restrict_users": false,
+            "proxy": true,
+            "proxy_callback": true,
+            "single_log_out": true,
+            "single_log_out_callback": ""
+        }
     }
-}
 ]
diff --git a/corres2math/matrix.py b/corres2math/matrix.py
new file mode 100644
index 0000000..94c7b67
--- /dev/null
+++ b/corres2math/matrix.py
@@ -0,0 +1,43 @@
+import asyncio
+from typing import Any, Dict, Optional, Union
+
+from nio import AsyncClient, RoomCreateError, RoomCreateResponse, RoomInviteError, RoomInviteResponse, RoomPreset, \
+    RoomVisibility
+
+
+class Matrix:
+    @classmethod
+    def _get_client(cls) -> AsyncClient:
+        if hasattr(cls, "_client"):
+            return cls._client
+
+        async def login():
+            cls._client = AsyncClient("https://correspondances-maths.fr", "@corres2mathbot:correspondances-maths.fr")
+            await cls._client.login("toto1234")
+            return cls._client
+        return asyncio.get_event_loop().run_until_complete(login())
+
+    @classmethod
+    def create_room(
+            cls,
+            visibility: RoomVisibility = RoomVisibility.private,
+            alias: Optional[str] = None,
+            name: Optional[str] = None,
+            topic: Optional[str] = None,
+            room_version: Optional[str] = None,
+            federate: bool = True,
+            is_direct: bool = False,
+            preset: Optional[RoomPreset] = None,
+            invite=(),
+            initial_state=(),
+            power_level_override: Optional[Dict[str, Any]] = None,
+    ) -> Union[RoomCreateResponse, RoomCreateError]:
+        resp: Union[RoomCreateResponse, RoomCreateError]
+
+        return asyncio.get_event_loop().run_until_complete(cls._get_client().room_create(
+            visibility, alias, name, topic, room_version, federate, is_direct, preset, invite, initial_state,
+            power_level_override))
+
+    @classmethod
+    def invite(cls, room_id: str, user_id: str) -> Union[RoomInviteResponse, RoomInviteError]:
+        return asyncio.get_event_loop().run_until_complete(cls._get_client().room_invite(room_id, user_id))
diff --git a/requirements.txt b/requirements.txt
index 086f289..fe4e57a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,14 +3,15 @@ django-bootstrap-datepicker-plus
 django-cas-server
 django-crispy-forms
 django-extensions
-django-filter
-django-haystack
+django-filter~=2.3.0
+django-haystack~=3.0
 django-mailer
 django-polymorphic
 django-tables2
-djangorestframework
+djangorestframework~=3.11.1
 django-rest-polymorphic
+matrix-nio
 ptpython
-python-magic
+python-magic~=0.4.18
 gunicorn
 whoosh
\ No newline at end of file