diff --git a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderV3Result.java b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderV3Result.java
index 00b72864c..e832f4c02 100644
--- a/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderV3Result.java
+++ b/weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderV3Result.java
@@ -110,7 +110,9 @@ public class WxPayUnifiedOrderV3Result implements Serializable {
     private static final long serialVersionUID = 5465773025172875110L;
 
     private String appid;
+    @SerializedName("partnerid")
     private String partnerId;
+    @SerializedName("prepayid")
     private String prepayId;
     /**
      * 由于package为java保留关键字，因此改为packageValue，序列化时会自动转换为package字段名
diff --git a/weixin-java-pay/src/test/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderV3ResultTest.java b/weixin-java-pay/src/test/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderV3ResultTest.java
index c3e2a62ca..15775ed70 100644
--- a/weixin-java-pay/src/test/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderV3ResultTest.java
+++ b/weixin-java-pay/src/test/java/com/github/binarywang/wxpay/bean/result/WxPayUnifiedOrderV3ResultTest.java
@@ -248,6 +248,13 @@ public class WxPayUnifiedOrderV3ResultTest {
     Assert.assertTrue(jsonObject.has("package"), "JSON中应该包含package字段");
     Assert.assertFalse(jsonObject.has("packageValue"), "JSON中不应该包含packageValue字段");
     Assert.assertEquals(jsonObject.get("package").getAsString(), "Sign=WXPay");
+    // 验证JSON序列化后partnerid和prepayid字段名为全小写（微信官方要求）
+    Assert.assertTrue(jsonObject.has("partnerid"), "JSON中应该包含partnerid字段");
+    Assert.assertFalse(jsonObject.has("partnerId"), "JSON中不应该包含驼峰的partnerId字段");
+    Assert.assertEquals(jsonObject.get("partnerid").getAsString(), testMchId);
+    Assert.assertTrue(jsonObject.has("prepayid"), "JSON中应该包含prepayid字段");
+    Assert.assertFalse(jsonObject.has("prepayId"), "JSON中不应该包含驼峰的prepayId字段");
+    Assert.assertEquals(jsonObject.get("prepayid").getAsString(), testPrepayId);
   }
 
   @Test(expectedExceptions = IllegalArgumentException.class,