diff --git a/db/app_uoj233.sql b/db/app_uoj233.sql
index 45fd58e..16bbb20 100644
--- a/db/app_uoj233.sql
+++ b/db/app_uoj233.sql
@@ -1025,7 +1025,8 @@ INSERT INTO `upgrades` (`name`, `status`, `updated_at`) VALUES
   ('28_remote_judge', 'up', now()),
   ('31_problem_resources', 'up', now()),
   ('36_decimal_score_range', 'up', now()),
-  ('40_contest_resources', 'up', now());
+  ('40_contest_resources', 'up', now()),
+  ('41_mail_notice', 'up', now());
 /*!40000 ALTER TABLE `upgrades` ENABLE KEYS */;
 UNLOCK TABLES;
 
diff --git a/web/app/upgrade/41_mail_notice/up.sql b/web/app/upgrade/41_mail_notice/up.sql
new file mode 100644
index 0000000..8ce0a26
--- /dev/null
+++ b/web/app/upgrade/41_mail_notice/up.sql
@@ -0,0 +1,12 @@
+CREATE TABLE `emails` (
+  `id` int UNSIGNED NOT NULL AUTO_INCREMENT,
+  `receiver` varchar(20) NOT NULL,
+  `subject` varchar(100) NOT NULL,
+  `content` text NOT NULL,
+  `created_at` datetime NOT NULL,
+  `send_time` datetime DEFAULT NULL,
+  `priority` int NOT NULL DEFAULT 0,
+  PRIMARY KEY (`id`),
+  KEY `send_time` (`send_time`),
+  KEY `priority` (`priority`)
+) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;