diff --git a/language/mn_MN/upgrade.lang.php b/language/mn_MN/upgrade.lang.php
new file mode 100755
index 000000000..045e74709
--- /dev/null
+++ b/language/mn_MN/upgrade.lang.php
@@ -0,0 +1,28 @@
+<?php
+// +-----------------------------------------------------------------------+
+// | Piwigo - a PHP based photo gallery                                    |
+// +-----------------------------------------------------------------------+
+// | Copyright(C) 2008-2013 Piwigo Team                  http://piwigo.org |
+// | Copyright(C) 2003-2008 PhpWebGallery Team    http://phpwebgallery.net |
+// | Copyright(C) 2002-2003 Pierrick LE GALL   http://le-gall.net/pierrick |
+// +-----------------------------------------------------------------------+
+// | This program is free software; you can redistribute it and/or modify  |
+// | it under the terms of the GNU General Public License 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.                                                                  |
+// +-----------------------------------------------------------------------+
+$lang['You do not have access rights to run upgrade'] = 'Уучлаарай, Танд шинэчлэх эрх байхгүй байна.';
+$lang['Only administrator can run upgrade: please sign in below.'] = 'Уучлаарай, зөвхөн админ шинэчлэх эрхтэй. Админы эрхээр системд нэвтэрнэ үү.';
+$lang['total upgrade time'] = 'Зарцуулсан хугацаа';
+$lang['Upgrade from version %s to %s'] = '%s-с %s хувилбар уруу шинэчлэх';
+$lang['Upgrade'] = 'Шинэчлэх';
+?>
\ No newline at end of file