diff --git a/squinnondation/peers.py b/squinnondation/peers.py
index 080bcea..8351026 100644
--- a/squinnondation/peers.py
+++ b/squinnondation/peers.py
@@ -4,8 +4,7 @@
 from datetime import datetime
 from random import randint, uniform
 from typing import Any, Tuple, Generator
-# from ipaddress import IPv6Address
-from threading import Thread, RLock
+from threading import Thread, Semaphore
 import curses
 import re
 import socket
@@ -116,9 +115,9 @@ class User(Peer):
         self.last_line = -1
 
         # Lock the refresh function in order to avoid concurrent refresh
-        self.refresh_lock = RLock()
+        self.refresh_lock = Semaphore()
         # Lock functions that can be used by two threads to avoid concurrent writing
-        self.data_lock = RLock()
+        self.data_lock = Semaphore()
 
         self.history = []
         self.received_messages = dict()