diff --git a/dns/aliyun.py b/dns/aliyun.py
index 6b7f520..333a678 100644
--- a/dns/aliyun.py
+++ b/dns/aliyun.py
@@ -17,7 +17,7 @@ class AliyunDNS:
         params = {
             'Format': 'JSON', 
             'Version': '2015-01-09', 
-            'AccessKeyId': ACCESS_KEY_ID, 
+            'AccessKeyId': self.ACCESS_KEY_ID, 
             'SignatureMethod': 'HMAC-SHA1', 
             'SignatureVersion': '1.0',
             'SignatureNonce': str(time.time()), 
@@ -30,7 +30,7 @@ class AliyunDNS:
         sign = 'GET&%2F&' + urllib.parse.quote_plus(sign)
         sign = base64.b64encode(
             hmac.new(
-                ACCESS_KEY_SECRET.encode('utf-8') + b'&', 
+                self.ACCESS_KEY_SECRET.encode('utf-8') + b'&', 
                 sign.encode('utf-8'), 
                 hashlib.sha1
             ).digest()
@@ -40,7 +40,7 @@ class AliyunDNS:
 
     def DescribeDomainRecords(self, DomainName, PageSize=100): # 查看所有解析记录
         response = requests.get(
-            url=BASE_URL, 
+            url=self.BASE_URL, 
             params=self.params(params={
                 'Action': 'DescribeDomainRecords',
                 'DomainName': DomainName, 
@@ -52,7 +52,7 @@ class AliyunDNS:
 
     def AddDomainRecord(self, DomainName, RR, Type, Value, Line="default", TTL=600): # 新增解析记录
         response = requests.get(
-            url=BASE_URL, 
+            url=self.BASE_URL, 
             params=self.params(params={
                 'Action': 'AddDomainRecord',
                 'DomainName': DomainName,
@@ -64,7 +64,7 @@ class AliyunDNS:
 
     def DeleteDomainRecord(self, RecordId): # 删除解析记录
         response = requests.get(
-            url=BASE_URL, 
+            url=self.BASE_URL, 
             params=self.params(params={
                 'Action': 'DeleteDomainRecord',
                 'RecordId': RecordId,