diff --git a/weixin4j-base/src/main/java/com/foxinmy/weixin4j/api/PayApi.java b/weixin4j-base/src/main/java/com/foxinmy/weixin4j/api/PayApi.java
index 661b73f0..0d2ed564 100644
--- a/weixin4j-base/src/main/java/com/foxinmy/weixin4j/api/PayApi.java
+++ b/weixin4j-base/src/main/java/com/foxinmy/weixin4j/api/PayApi.java
@@ -387,8 +387,8 @@ public class PayApi extends MchApi {
 			String outTradeNo, double totalFee, String createIp, String attach)
 			throws WeixinException {
 		MchPayPackage payPackage = new MchPayPackage(body, outTradeNo,
-				totalFee, null, createIp, TradeType.MICROPAY, null, null, null,
-				attach);
+				totalFee, null, createIp, TradeType.MICROPAY, null, authCode,
+				null, attach);
 		return createPayRequest(payPackage);
 	}