diff --git a/kiri-engine/Pool/Connection.php b/kiri-engine/Pool/Connection.php
index 79632d86..49d17ef4 100644
--- a/kiri-engine/Pool/Connection.php
+++ b/kiri-engine/Pool/Connection.php
@@ -137,13 +137,10 @@ class Connection extends Component
 					PDO::ATTR_ERRMODE            => PDO::ERRMODE_EXCEPTION,
 					PDO::ATTR_ORACLE_NULLS       => PDO::NULL_NATURAL,
 					PDO::ATTR_STRINGIFY_FETCHES  => false,
-					PDO::ATTR_EMULATE_PREPARES   => false,
+					PDO::ATTR_EMULATE_PREPARES   => true,
 					PDO::ATTR_TIMEOUT            => $config['connect_timeout'],
 					PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES ' . ($config['charset'] ?? 'utf8mb4')
 				]);
-			$link->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
-			$link->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, false);
-			$link->setAttribute(PDO::ATTR_ORACLE_NULLS, PDO::NULL_EMPTY_STRING);
 			foreach ($config['attributes'] as $key => $attribute) {
 				$link->setAttribute($key, $attribute);
 			}