diff --git a/danmu/Panda.py b/danmu/Panda.py
index be0c27c..fc58885 100644
--- a/danmu/Panda.py
+++ b/danmu/Panda.py
@@ -29,15 +29,12 @@ def _get_live_status(self):
         return j['videoinfo']['status'] == '2'
     def _prepare_env(self):
         roomId = self.url.split('/')[-1] or self.url.split('/')[-2]
-        url = 'http://www.panda.tv/ajax_chatroom?roomid=%s&_=%s'%(roomId, str(int(time.time())))
-        roomInfo = requests.get(url).json()
-        url = 'http://api.homer.panda.tv/chatroom/getinfo'
+        url = 'http://riven.panda.tv/chatroom/getinfo'
         params = {
-            'rid': roomInfo['data']['rid'],
+            'app': 1,
+            'protocol': 'ws',
             'roomid': roomId,
-            'retry': 0,
-            'sign': roomInfo['data']['sign'], 
-            'ts': roomInfo['data']['ts'],
+            '_caller': 'panda-pc_web',
             '_': int(time.time()), }
         serverInfo = requests.get(url, params).json()['data']
         serverAddress = serverInfo['chat_addr_list'][0].split(':')