diff --git a/get_vip_last_booking.php b/get_vip_last_booking.php
index de0d8cb..ae07ebb 100644
--- a/get_vip_last_booking.php
+++ b/get_vip_last_booking.php
@@ -35,7 +35,7 @@ try {
                 b.appointment_time DESC
             LIMIT 1";
     
-    $stmt = $conn->prepare($sql);
+    $stmt = $pdo->prepare($sql);
     $stmt->bindParam(':vipId', $vipId, PDO::PARAM_INT);
     $stmt->execute();
     $lastBooking = $stmt->fetch(PDO::FETCH_ASSOC);
@@ -64,6 +64,6 @@ $response = [
 echo json_encode($response);
 
 // 关闭数据库连接
-$conn = null;
+$pdo = null;
 
 // 系统现在只返回实际数据库中的预约记录数据
\ No newline at end of file