diff --git a/upload/install/index.php b/upload/install/index.php
index 38a8dbf..2379438 100644
--- a/upload/install/index.php
+++ b/upload/install/index.php
@@ -343,7 +343,7 @@ if($method == 'show_license') {
 
 
 		$uid = DZUCFULL ? 1 : $adminuser['uid'];
-		$authkey = substr(md5($_SERVER['SERVER_ADDR'].$_SERVER['HTTP_USER_AGENT'].$dbhost.$dbuser.$dbpw.$dbname.$username.$password.$pconnect.substr($timestamp, 0, 6)), 8, 6).random(10);
+		$authkey = md5($_SERVER['SERVER_ADDR'].$_SERVER['HTTP_USER_AGENT'].$dbhost.$dbuser.$dbpw.$dbname.$username.$password.$pconnect.substr($timestamp, 0, 8)).random(18);
 		$_config['db'][1]['dbhost'] = $dbhost;
 		$_config['db'][1]['dbname'] = $dbname;
 		$_config['db'][1]['dbpw'] = $dbpw;