diff --git a/radius_auth.py b/radius_auth.py
index 7ac5a720..fcab0fb8 100644
--- a/radius_auth.py
+++ b/radius_auth.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python
 # -*- coding: iso-8859-15 -*-
 
-import os, md5, sys, binascii
+import os, hashlib, sys, binascii
 from syslog import syslog, openlog
 
 sys.path.append('/usr/scripts/gestion')
@@ -19,7 +19,7 @@ def chap_ok(password, challenge, clear_pass) :
     try :
         challenge = binascii.a2b_hex(challenge.replace('0x',''))
         password = binascii.a2b_hex(password.replace('0x',''))
-        if md5.new(password[0] + clear_pass + challenge).digest() == password[1:] :
+        if hashlib.md5(password[0] + clear_pass + challenge).digest() == password[1:] :
             return True
     except :
         return False