diff --git a/README.md b/README.md
index f150eb4..c434275 100644
--- a/README.md
+++ b/README.md
@@ -8,6 +8,11 @@ command line. It's provide parameters permiting :
 * to specify as wich user the backup is run for BackupPC ;
 * to stop running backup instead of starting new one, and how many hour(s) BackupPC could not start automatically backup ;
 
+Compatibility
+-------------
+
+This script have been successfully test with BackupPC 3 (3.3.0) and 4 (4.1.5).
+
 Usage
 -----
 
@@ -32,3 +37,17 @@ Options:
                                 start backup during next x hour(s) (Default : 1 hour(s))
   --dry-run,-j                  Perform a trial run (do nothing real)
 ```
+
+Copyright
+---------
+
+Copyright (c) 2017 Benjamin Renard
+
+License
+-------
+
+This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License version 3 as published by the Free Software Foundation.
+
+This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
diff --git a/backuppcQueueBackup b/backuppcQueueBackup
index 892cc9c..b6dd576 100755
--- a/backuppcQueueBackup
+++ b/backuppcQueueBackup
@@ -1,4 +1,16 @@
 #!/usr/bin/perl
+#
+# backuppcQueueBackup
+#
+# Script to queue backup in BackupPC from command line
+#
+# Author: Benjamin Renard <brenard@zionetrix.net>
+#
+# Copyright (C) 2017, Benjamin Renard
+#
+# Licensed under the GNU General Public License version 3 or
+# any later version.
+#
 
 use strict;
 no utf8;