diff --git a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/Amount.java b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/Amount.java
index 2c865b7..3cf71e1 100644
--- a/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/Amount.java
+++ b/payment-spring-boot-autoconfigure/src/main/java/cn/felord/payment/wechat/v3/model/Amount.java
@@ -31,7 +31,7 @@ public class Amount {
     /**
      * 金额，单位【分】。
      */
-    private int total;
+    private Integer total;
     /**
      * 货币单位，固定为 CNY 。
      */