diff --git a/src/main/java/com/rnt/controller/WeixinPayController.java b/src/main/java/com/rnt/controller/WeixinPayController.java
index 22f7a05..7faf92e 100644
--- a/src/main/java/com/rnt/controller/WeixinPayController.java
+++ b/src/main/java/com/rnt/controller/WeixinPayController.java
@@ -131,7 +131,7 @@ public class WeixinPayController extends Controller {
             orderType = "2";
         } else {
             //月卡
-            Date endDate = DateUtil.offset(startDate, DateField.MONTH, num);
+            Date endDate = DateUtil.offsetDay(DateUtil.offset(startDate, DateField.MONTH, num),-1);
             endDateStr = DateUtil.format(endDate, "yyyy-MM-dd");
             orderType = "3";
         }