diff --git a/clients.py b/clients.py
index ee0ba2d..0f0387d 100644
--- a/clients.py
+++ b/clients.py
@@ -189,7 +189,7 @@ async def connect(self):
         """Establishes a WebSocket connection using authentication."""
         host = self.WS_BASE_URL + self.url_suffix
         auth_headers = self.request_headers("GET", self.url_suffix)
-        async with websockets.connect(host, additional_headers=auth_headers) as websocket:
+        async with websockets.connect(host, extra_headers=auth_headers) as websocket:
             self.ws = websocket
             await self.on_open()
             await self.handler()