diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/ecommerce/PartnerTransactionsRequest.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/ecommerce/PartnerTransactionsRequest.java
index b1ace4d57..bde15dc39 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/ecommerce/PartnerTransactionsRequest.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/ecommerce/PartnerTransactionsRequest.java
@@ -100,7 +100,7 @@ public class PartnerTransactionsRequest implements Serializable {
    * </pre>
    */
   @SerializedName(value = "out_trade_no")
-  private String out_trade_no;
+  private String outTradeNo;
 
   /**
    * <pre>