diff --git a/LICENSE b/LICENSE
index ed35fe5..9dba397 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
-MIT License
+The MIT License (MIT)
 
-Copyright (c) 2021 vn.py
+Copyright (c) 2015-present, Xiaoyou Chen
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/README.md b/README.md
index 5dae7c0..a06cc8c 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 </p>
 
 <p align="center">
-    <img src ="https://img.shields.io/badge/version-2021.8.15-blueviolet.svg"/>
+    <img src ="https://img.shields.io/badge/version-2021.9.17-blueviolet.svg"/>
     <img src ="https://img.shields.io/badge/platform-windows|linux|macos-yellow.svg"/>
     <img src ="https://img.shields.io/badge/python-3.7-blue.svg" />
     <img src ="https://img.shields.io/github/license/vnpy/vnpy.svg?color=orange"/>
@@ -13,13 +13,11 @@
 
 ## 说明
 
-基于Bitfinex交易所的API开发，支持账户下的数字货币交易。
-
-请在Bitfinex网站完成账户的相应设置后再使用。
+基于Bitfinex交易所的API开发。
 
 ## 安装
 
-安装需要基于2.2.0版本以上的[VN Studio](https://www.vnpy.com)。
+安装需要基于2.6.0版本以上的[VN Studio](https://www.vnpy.com)。
 
 直接使用pip命令：
 
diff --git a/setup.cfg b/setup.cfg
index da63602..20a95dd 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,11 +1,11 @@
 [metadata]
 name = vnpy_bitfinex
-version = 2021.8.24
+version = 2021.9.17
 url = https://www.vnpy.com
 license = MIT
 author = Xiaoyou Chen
 author_email = xiaoyou.chen@mail.vnpy.com
-description = BITFINEX gateway for vn.py quant trading framework.
+description = Bitfinex gateway for vn.py quant trading framework.
 long_description = file: README.md
 long_description_content_type = text/markdown
 keywords =
diff --git a/vnpy_bitfinex/__init__.py b/vnpy_bitfinex/__init__.py
index 4f5d797..ac8d890 100644
--- a/vnpy_bitfinex/__init__.py
+++ b/vnpy_bitfinex/__init__.py
@@ -1 +1,31 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2015-present, Xiaoyou Chen
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+import importlib_metadata
+
 from .bitfinex_gateway import BitfinexGateway
+
+
+try:
+    __version__ = importlib_metadata.version("vnpy_bitfinex")
+except importlib_metadata.PackageNotFoundError:
+    __version__ = "dev"
diff --git a/vnpy_bitfinex/bitfinex_gateway.py b/vnpy_bitfinex/bitfinex_gateway.py
index 99fe0dd..b0eb5a6 100644
--- a/vnpy_bitfinex/bitfinex_gateway.py
+++ b/vnpy_bitfinex/bitfinex_gateway.py
@@ -34,6 +34,7 @@
     HistoryRequest
 )
 
+
 # UTC时区
 UTC_TZ = pytz.utc
 
@@ -624,14 +625,14 @@ def on_trade_update(self, data: dict) -> None:
         info: dict = data[2]
 
         if name == "ws":
-            for l in info:
-                self.on_wallet(l)
+            for buf in info:
+                self.on_wallet(buf)
             self.gateway.write_log("账户资金获取成功")
         elif name == "wu":
             self.on_wallet(info)
         elif name == "os":
-            for l in info:
-                self.on_order(l)
+            for buf in info:
+                self.on_order(buf)
             self.gateway.write_log("活动委托获取成功")
         elif name in ["on", "ou", "oc"]:
             self.on_order(info)