diff --git a/db/update21.7.4.sql b/db/update21.7.4.sql
new file mode 100644
index 0000000000..0f05e460b9
--- /dev/null
+++ b/db/update21.7.4.sql
@@ -0,0 +1 @@
+ALTER TABLE `zt_case` CHANGE `order` `order` mediumint(8) unsigned NOT NULL DEFAULT '0';
\ No newline at end of file
diff --git a/db/zentao.sql b/db/zentao.sql
index d5177c01c5..a3c3746cdd 100755
--- a/db/zentao.sql
+++ b/db/zentao.sql
@@ -472,7 +472,7 @@ CREATE TABLE IF NOT EXISTS `zt_case` (
   `subStatus` varchar(30) NOT NULL default '',
   `color` char(7) NOT NULL DEFAULT '',
   `frequency` enum('1','2','3') NOT NULL default '1',
-  `order` tinyint(30) unsigned NOT NULL default '0',
+  `order` mediumint(8) unsigned NOT NULL default '0',
   `openedBy` char(30) NOT NULL default '',
   `openedDate` datetime NULL,
   `reviewedBy` varchar(255) NOT NULL DEFAULT '',