diff --git a/doc/_common.py b/doc/_common.py
index 3b35ada..a84962e 100644
--- a/doc/_common.py
+++ b/doc/_common.py
@@ -3,7 +3,7 @@
 class ReqHead(object):
 
     def __init__(self):
-        self.params = [
+        self.fields = [
             ['account_id', '', '账号id'],
             ['session_id', '', '会话id'],
         ]