diff --git a/src/Essensoft.Paylink.WeChatPay/V3/Domain/CollectionDetail.cs b/src/Essensoft.Paylink.WeChatPay/V3/Domain/CollectionDetail.cs
index 9600a50fb..d596f586f 100644
--- a/src/Essensoft.Paylink.WeChatPay/V3/Domain/CollectionDetail.cs
+++ b/src/Essensoft.Paylink.WeChatPay/V3/Domain/CollectionDetail.cs
@@ -1,4 +1,5 @@
-using System.Text.Json.Serialization;
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
 
 namespace Essensoft.Paylink.WeChatPay.V3.Domain
 {
@@ -67,6 +68,6 @@ public class CollectionDetail : WeChatPayObject
         /// 注：针对2020年5月27日10:00:00以后完结的订单生效
         /// </remarks>
         [JsonPropertyName("promotion_detail")]
-        public PromotionDetail PromotionDetail { get; set; }
+        public List<PromotionDetail> PromotionDetail { get; set; }
     }
 }