diff --git a/core/core.py b/core/core.py
index 1510764..5906322 100644
--- a/core/core.py
+++ b/core/core.py
@@ -68,7 +68,7 @@ def set_new_server_func(sock):
     sock.new_server_func = functools.partial(
         control_server.post_terminal_info,
         lambda: monitor._name,
-        lambda: sock.ws_url,
+        lambda: monitor._socket.ws_url,
         lambda: monitor.size,
         lambda: monitor.version.name
     )