diff --git a/application/index/controller/Index.php b/application/index/controller/Index.php
index 2371a7a..476cbf2 100644
--- a/application/index/controller/Index.php
+++ b/application/index/controller/Index.php
@@ -112,7 +112,7 @@ class Index extends BasicApi
             $sql = str_replace("`pms_", "`{$mysqlPrefix}", $sql);
             $pdo = new PDO("mysql:host={$mysqlHostname};port={$mysqlHostport}", $mysqlUsername, $mysqlPassword, array(
                 PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
-                PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8mb"
+                PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8mb4"
             ));
 
             //检测是否支持innodb存储引擎