diff --git a/resolvers/inbox/chats.py b/resolvers/inbox/chats.py
index c158e066..2a953a12 100644
--- a/resolvers/inbox/chats.py
+++ b/resolvers/inbox/chats.py
@@ -80,7 +80,7 @@ async def create_chat(_, info, title="", members=[]):
         "createdBy": auth.user_id,
         "createdAt": int(datetime.now(tz=timezone.utc).timestamp()),
         "updatedAt": int(datetime.now(tz=timezone.utc).timestamp()),
-        "admins": []
+        "admins": members if (len(members) == 2 and title == "") else []
     }
 
     for m in members:
diff --git a/resolvers/inbox/messages.py b/resolvers/inbox/messages.py
index d9ca6a4c..03285b67 100644
--- a/resolvers/inbox/messages.py
+++ b/resolvers/inbox/messages.py
@@ -33,6 +33,8 @@ async def create_message(_, info, chat: str, body: str, replyTo=None):
             "replyTo": replyTo,
             "createdAt": int(datetime.now(tz=timezone.utc).timestamp()),
         }
+        chat['updatedAt'] = new_message['createdAt']
+        await redis.execute("SET", f"chats/{chat['id']}", json.dumps(chat))
         print(f"[inbox] creating message {new_message}")
         await redis.execute(
             "SET", f"chats/{chat['id']}/messages/{message_id}", json.dumps(new_message)
diff --git a/schema.graphql b/schema.graphql
index 09cb934d..35f4663d 100644
--- a/schema.graphql
+++ b/schema.graphql
@@ -512,13 +512,13 @@ type Message {
 type Chat {
   id: String!
   createdAt: Int!
-  createdBy: String!
+  createdBy: Int!
   updatedAt: Int!
   title: String
   description: String
-  users: [String]
+  users: [Int]
   members: [ChatMember]
-  admins: [String]
+  admins: [Int]
   messages: [Message]
   unread: Int
   private: Boolean