diff --git a/PCRC.py b/PCRC.py
index fac98ea..a6db62e 100644
--- a/PCRC.py
+++ b/PCRC.py
@@ -1,7 +1,6 @@
-# coding: utf8
-
 import time
 import traceback
+from typing import Optional
 
 if __name__ == '__main__':
 	from utils import utils, constant
@@ -16,7 +15,7 @@
 	from .utils.config import Config
 	from .utils.pycraft.exceptions import YggdrasilError
 
-recorder = None
+recorder: Optional[Recorder] = None
 logger = Logger(name='PCRC')
 ConfigFile = utils.get_path('config.json')
 TranslationFolder = utils.get_path('lang/')
diff --git a/readme.md b/readme.md
index 8bc3592..bc73627 100644
--- a/readme.md
+++ b/readme.md
@@ -38,6 +38,7 @@ PCRC currently supports connecting to vanilla Minecraft server. Supports version
 - 1.16.3
 - 1.16.4
 - 1.17.1
+
 ## Advantage
 
 - Can be hosted server side for 24/7 recording
diff --git a/readme_cn.md b/readme_cn.md
index e0c8d55..6f516ad 100644
--- a/readme_cn.md
+++ b/readme_cn.md
@@ -36,6 +36,8 @@ PCRC 目前支持连接官服原版 Minecraft 服务端，支持以下版本：
 - 1.16.1
 - 1.16.2
 - 1.16.3
+- 1.16.4
+- 1.17.1
 
 ## 优势
 
@@ -54,6 +56,7 @@ PCRC 目前支持连接官服原版 Minecraft 服务端，支持以下版本：
 4. 在控制台中输入指令 `start` 以启动 PCRC
 5. （**推荐**）将 PCRC 机器人切换为旁观者模式
 6. 使用控制台或游戏内聊天来控制 PCRC
+
 ## 配置文件
 
 配置文件为 `config.json`，所有设置均可在其中更改。其中名为如 `__1__` 的为分隔符，无需修改
diff --git a/requirements.txt b/requirements.txt
index d3a10ce..a0f7d71 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 cryptography>=1.5
-requests~=2.22.0
+requests>=2.22.0
 future
 PyYAML>=5.1
-PyNBT~=3.0.0
+PyNBT>=3.0.0
diff --git a/utils/constant.py b/utils/constant.py
index 28d5c63..f75edd5 100644
--- a/utils/constant.py
+++ b/utils/constant.py
@@ -2,7 +2,7 @@
 import os
 from . import pycraft
 
-Version = '0.11.2-alpha'
+Version = '0.11.3-alpha'
 ROOT_PATH = [
 	os.path.join(os.path.dirname(os.path.abspath(__file__)), '..', ''),  # I'm in ./utils/ folder so ../ might be the path
 	'./',
diff --git a/utils/recorder.py b/utils/recorder.py
index e78bced..d894f46 100644
--- a/utils/recorder.py
+++ b/utils/recorder.py
@@ -91,7 +91,7 @@ def is_working(self):
 		return self.working
 
 	def onConnectionException(self, exc, exc_info):
-		self.logger.error('Exception in network thread: {}'.format(exc))
+		self.logger.error('Exception in network thread: {} {}'.format(type(exec), exc))
 		self.logger.debug(traceback.format_exc())
 		if not self.stop_by_user:
 			self.logger.error('Stopping the recorder since PCRC has not been stopped by user')