diff --git a/tools/relay.py b/tools/relay.py
index 1d9c341..c745236 100755
--- a/tools/relay.py
+++ b/tools/relay.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 
 import socket, sys, getopt
 
@@ -19,11 +19,11 @@ arguments = sys.argv[1:]
 opts, args = getopt.getopt(arguments, options)
 
 for o, a in opts:
-    print '    ', o, ' --> ', a
+    print ('    ', o, ' --> ', a)
     if		"-v" == o:	verbose += 1
     elif	"-p" == o:	rx_port = int(a)
 
-print "listening port    : ", rx_port
+print ("listening port    : ", rx_port)
 
 # ---
 
@@ -34,7 +34,7 @@ for ligne in open("destinations.liste"):
     if p:	cibles.append((a, int(p)))
 
 for cible in cibles:
-    print "   -> ", cible
+    print ("   -> ", cible)
     
 
 #   point d'entree, d'ecoute
@@ -49,7 +49,7 @@ sock_tx = socket.socket(socket.AF_INET, # Internet
 while True:
     data, addr = sock_rx.recvfrom(1024) # buffer size is 1024 bytes
     if verbose:
-        print "got:", addr, " ", len(data)
+        print ("got:", addr, " ", len(data))
     for cible in cibles:
         # print cible
         sock_tx.sendto(data, cible)