diff --git a/db/update21.7.6.sql b/db/update21.7.6.sql
index 6ad2f751af..a1fe1228e6 100644
--- a/db/update21.7.6.sql
+++ b/db/update21.7.6.sql
@@ -6,6 +6,7 @@ ALTER TABLE `zt_opportunity` CHANGE `pri` `pri` tinyint unsigned NOT NULL DEFAUL
 ALTER TABLE `zt_design` CHANGE `project` `project` int unsigned NOT NULL DEFAULT 0;
 ALTER TABLE `zt_design` CHANGE `product` `product` int unsigned NOT NULL DEFAULT 0;
 ALTER TABLE `zt_acl` CHANGE `id` `id` int unsigned NOT NULL AUTO_INCREMENT FIRST;
+ALTER TABLE `zt_user` CHANGE `mobile` `mobile` varchar(20) NOT NULL DEFAULT '';
 
 ALTER TABLE `zt_doc` ADD `reportModule` varchar(20) NOT NULL DEFAULT '0' AFTER `module`;
 UPDATE `zt_doc` SET `reportModule` = `module` WHERE `templateType` = 'projectReport';
diff --git a/db/zentao.sql b/db/zentao.sql
index 17617af7a2..20be019239 100755
--- a/db/zentao.sql
+++ b/db/zentao.sql
@@ -2384,7 +2384,7 @@ CREATE TABLE IF NOT EXISTS `zt_user` (
   `email` char(90) NOT NULL DEFAULT '',
   `skype` char(90) NOT NULL DEFAULT '',
   `qq` char(20) NOT NULL DEFAULT '',
-  `mobile` char(11) NOT NULL DEFAULT '',
+  `mobile` varchar(20) NOT NULL DEFAULT '',
   `phone` char(20) NOT NULL DEFAULT '',
   `weixin` varchar(90) NOT NULL DEFAULT '',
   `dingding` varchar(90) NOT NULL DEFAULT '',