diff --git a/conn/manager/internal/connection_manager.py b/conn/manager/internal/connection_manager.py
index e630e13..6130b9b 100644
--- a/conn/manager/internal/connection_manager.py
+++ b/conn/manager/internal/connection_manager.py
@@ -1,3 +1,4 @@
+import asyncio
 from fastapi.websockets import WebSocket
 from conn import Conn
 from message import Message
@@ -65,9 +66,14 @@ def generate_conn_id():
     @staticmethod
     async def receive_broadcast_event(message: Message):
         overwrite_event(message)
+
+        coroutines = []
+
         for id in ConnectionManager.conns:
             conn = ConnectionManager.conns[id]
-            await conn.send(message)
+            coroutines.append(conn.send(message))
+
+        await asyncio.gather(*coroutines)
 
     @EventBroker.add_receiver("multicast")
     @staticmethod
@@ -75,12 +81,17 @@ async def receive_multicast_event(message: Message):
         overwrite_event(message)
         if "target_conns" not in message.header:
             raise DumbHumanException()
+
+        coroutines = []
+
         for conn_id in message.header["target_conns"]:
             conn = ConnectionManager.get_conn(conn_id)
             if not conn:
                 raise DumbHumanException()
 
-            await conn.send(message)
+            coroutines.append(conn.send(message))
+
+        await asyncio.gather(*coroutines)
 
     @staticmethod
     async def handle_message(message: Message):
diff --git a/event/internal/event_broker.py b/event/internal/event_broker.py
index 6301391..df78933 100644
--- a/event/internal/event_broker.py
+++ b/event/internal/event_broker.py
@@ -1,4 +1,5 @@
 from __future__ import annotations
+import asyncio
 from typing import Callable, Generic
 from message import Message
 from .exceptions import NoMatchingReceiverException
@@ -78,10 +79,14 @@ async def publish(message: Message):
         if message.event not in EventBroker.event_dict:
             raise NoMatchingReceiverException(message.event)
 
+        coroutines = []
+
         receiver_ids = EventBroker.event_dict[message.event]
         for id in receiver_ids:
             receiver = Receiver.get_receiver(id)
-            await receiver(message)
+            coroutines.append(receiver(message))
+
+        await asyncio.gather(*coroutines)
 
     def _debug(message: Message):
         print(message.to_str(del_header=False))