diff --git a/pytchat/util/__init__.py b/pytchat/util/__init__.py
index 24b8e95..95ce56a 100644
--- a/pytchat/util/__init__.py
+++ b/pytchat/util/__init__.py
@@ -1,7 +1,7 @@
 import requests,json,datetime
 from .. import config
 
-def download(cls,url):
+def download(url):
     _session = requests.Session()
     html = _session.get(url, headers=config.headers)
     with open(str(datetime.datetime.now().strftime('%Y-%m-%d %H-%M-%S')
@@ -9,7 +9,7 @@ def download(cls,url):
         json.dump(html.json(),f,ensure_ascii=False)
 
 
-def save(cls,data,filename):
+def save(data,filename):
     with open(str(datetime.datetime.now().strftime('%Y-%m-%d %H-%M-%S')
                             )+filename,mode ='w',encoding='utf-8') as f:
         f.writelines(data)