diff --git a/index.php b/index.php
index b0e59bf..095be4a 100644
--- a/index.php
+++ b/index.php
@@ -1,6 +1,6 @@
 <?php
 $mytime = new Datetime("now");
-$timestamp = $mytime->format('U').$rand();
+$timestamp = $mytime->format('U').rand();
 
 // CREATE 6 G1BILLETS in /tmp/g1billet/$timestamp
 $page = shell_exec(dirname(__FILE__)."/G1BILLETS.sh '".$_REQUEST['montant']."' '".$timestamp."'");