diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/WxPayRefundV3Request.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/WxPayRefundV3Request.java
index 4ebb10fba..b53441625 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/WxPayRefundV3Request.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/WxPayRefundV3Request.java
@@ -143,7 +143,7 @@ public class WxPayRefundV3Request implements Serializable {
      * <pre>
      * 字段名：币类型
      * 变量名：currency
-     * 是否必填：否
+     * 是否必填：是
      * 类型：string[1, 16]
      * 描述：
      *  符合ISO 4217标准的三位字母代码，目前只支持人民币：CNY。