diff --git a/src/peerjs/peer.py b/src/peerjs/peer.py
index 3011b38..beebd8b 100644
--- a/src/peerjs/peer.py
+++ b/src/peerjs/peer.py
@@ -4,7 +4,7 @@
 # from websockets import WebSocket, ConnectionClosed
 import asyncio
 import logging
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 from typing import Any, List
 import traceback
 
@@ -49,7 +49,7 @@ class PeerOptions:
     path: str = "/"
     key: str = PEER_DEFAULT_KEY
     token: str = None
-    config: Any = util.defaultConfig
+    config: Any = field(default_factory=lambda: util.defaultConfig)
     secure: bool = False
     pingInterval: int = 5  # ping to signaling server in seconds
 
diff --git a/src/setup.cfg b/src/setup.cfg
index 890eaf9..c271aba 100644
--- a/src/setup.cfg
+++ b/src/setup.cfg
@@ -21,7 +21,7 @@ classifiers =
 packages = find_namespace:
 python_requires = >=3.7
 install_requires = 
-	av>=8.0,<10.1
+	av>=8.0
 	aiortc>=0.9
 	websockets>=8.1
 	aiohttp>=3.6