diff --git a/sql/relationdb_n.sql b/sql/relationdb_n.sql
index 01419cc..4c81ff2 100644
--- a/sql/relationdb_n.sql
+++ b/sql/relationdb_n.sql
@@ -102,6 +102,7 @@ CREATE TABLE `friend_apply` (
   PRIMARY KEY (`idx`),
   UNIQUE KEY `applyid` (`applyid`),
   KEY `target_id` (`target_id`),
+  KEY `sender_id` (`sender_id`),
   KEY `target_sender` (`target_id`, `sender_id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10000 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;
diff --git a/sql/relationdb_n_migrate_200704_01.sql b/sql/relationdb_n_migrate_200704_01.sql
new file mode 100644
index 0000000..9e406a8
--- /dev/null
+++ b/sql/relationdb_n_migrate_200704_01.sql
@@ -0,0 +1,7 @@
+begin;
+
+alter table friend_apply add KEY `sender_id` (`sender_id`);
+
+insert into version (version) values(2020070401);
+
+commit;