diff --git a/apps/participation/management/commands/fix_matrix_channels.py b/apps/participation/management/commands/fix_matrix_channels.py
index 640c581..4bd1ef6 100644
--- a/apps/participation/management/commands/fix_matrix_channels.py
+++ b/apps/participation/management/commands/fix_matrix_channels.py
@@ -1,7 +1,9 @@
+import os
+
 from asgiref.sync import async_to_sync
 from nio import RoomPreset
 
-from corres2math.matrix import Matrix, RoomVisibility
+from corres2math.matrix import Matrix, RoomVisibility, UploadError
 from django.core.management import BaseCommand
 from registration.models import AdminRegistration, Registration
 
@@ -10,6 +12,20 @@ class Command(BaseCommand):
     def handle(self, *args, **options):
         Matrix.set_display_name("Bot des Correspondances")
 
+        if not os.path.isfile(".matrix_avatar"):
+            stat_file = os.stat("corres2math/static/logo.png")
+            with open("corres2math/static/logo.png", "rb") as f:
+                resp, _ = Matrix.upload(f, filename="logo.png", content_type="image/png", filesize=stat_file.st_size)
+            if isinstance(resp, UploadError):
+                raise Exception(resp)
+            avatar_uri = resp.content_uri
+            with open(".matrix_avatar", "w") as f:
+                f.write(avatar_uri)
+            Matrix.set_avatar(avatar_uri)
+        else:
+            with open(".matrix_avatar", "r") as f:
+                avatar_uri = f.read().rstrip(" \t\r\n")
+
         if not async_to_sync(Matrix.resolve_room_alias)("#faq:correspondances-maths.fr"):
             Matrix.create_room(
                 visibility=RoomVisibility.public,
diff --git a/corres2math/matrix.py b/corres2math/matrix.py
index 588e454..1dae861 100644
--- a/corres2math/matrix.py
+++ b/corres2math/matrix.py
@@ -1,4 +1,5 @@
 import os
+from typing import Tuple
 
 from asgiref.sync import async_to_sync
 from nio import *
@@ -11,6 +12,7 @@ class Matrix:
     @classmethod
     async def _get_client(cls) -> AsyncClient:
         client = AsyncClient("https://correspondances-maths.fr", "@corres2mathbot:correspondances-maths.fr")
+        client.user_id = "@corres2mathbot:correspondances-maths.fr"
 
         if os.path.isfile(".matrix_token"):
             with open(".matrix_device", "r") as f:
@@ -36,6 +38,26 @@ class Matrix:
         client = await cls._get_client()
         return await client.set_displayname(name)
 
+    @classmethod
+    @async_to_sync
+    async def set_avatar(cls, avatar_url: str) -> Union[ProfileSetAvatarResponse, ProfileSetAvatarError]:
+        client = await cls._get_client()
+        return await client.set_avatar(avatar_url)
+
+    @classmethod
+    @async_to_sync
+    async def upload(
+            cls,
+            data_provider: DataProvider,
+            content_type: str = "application/octet-stream",
+            filename: Optional[str] = None,
+            encrypt: bool = False,
+            monitor: Optional[TransferMonitor] = None,
+            filesize: Optional[int] = None,
+    ) -> Tuple[Union[UploadResponse, UploadError], Optional[Dict[str, Any]]]:
+        client = await cls._get_client()
+        return await client.upload(data_provider, content_type, filename, encrypt, monitor, filesize)
+
     @classmethod
     @async_to_sync
     async def create_room(
@@ -93,7 +115,6 @@ class Matrix:
         resp = await client.room_get_state_event(room_id, "m.room.power_levels")
         content = resp.content
         content["users"][user_id] = power_level
-        print(content)
         return await client.room_put_state(room_id, "m.room.power_levels", content=content, state_key=resp.state_key)
 
     @classmethod
@@ -109,5 +130,4 @@ class Matrix:
             content["events"][event] = power_level
         else:
             content[event] = power_level
-        print(content)
         return await client.room_put_state(room_id, "m.room.power_levels", content=content, state_key=resp.state_key)