diff --git a/alipay-api/src/main/java/me/hao0/alipay/model/AlipayFields.java b/alipay-api/src/main/java/me/hao0/alipay/model/AlipayFields.java
index b1ae03b..ff1baa8 100644
--- a/alipay-api/src/main/java/me/hao0/alipay/model/AlipayFields.java
+++ b/alipay-api/src/main/java/me/hao0/alipay/model/AlipayFields.java
@@ -12,9 +12,6 @@
  */
 public class AlipayFields {
 
-    private AlipayFields() {
-        
-    }
     
     /**
      * PC支付服务器通知参数
@@ -85,4 +82,8 @@ private AlipayFields() {
             AlipayField.SIGN, AlipayField.SIGN_TYPE, AlipayField.NOTIFY_ID, AlipayField.NOTIFY_TIYE,
             AlipayField.NOTIFY_TIME, AlipayField.BATCH_NO, AlipayField.SUCCESS_NUM, AlipayField.RESULT_DETAILS
     );
+    
+    private AlipayFields() {
+        
+    }
 }