diff --git a/README.md b/README.md
index daf2a86..c936749 100644
--- a/README.md
+++ b/README.md
@@ -76,33 +76,60 @@ JSON.stringify({
 
 ## 🔍结果
 
-当你完成上述流程，可以在`Actions`页面点击`Genshin Impact Helper`-->`build`-->`run sign`查看结果。
+当你完成上述流程，可以在`Actions`页面点击`Genshin Impact Helper`-->`build`-->`Run sign`查看结果。
+
+### 签到成功
 
 如果成功，会输出类似`"result": "Success"`的信息：
 
 ```
-2020-10-30T11:30:08 INFO sleep for 214 seconds ...
-2020-10-30T11:30:08 INFO UID is 100***001
-2020-10-30T11:30:09 INFO {
+2020-11-18T22:11:45 INFO Sleep for 100 seconds ...
+2020-11-18T22:13:26 INFO UID is 102***054
+2020-11-18T22:13:27 INFO {
   "result": "Success",
-  "message": "{'data': None, 'message': '旅行者,你已经签到过了', 'retcode': -5003}"
+  "message": "{\"retcode\": 0, \"message\": \"OK\", \"data\": {\"code\": \"ok\"}}"
 }
 ```
 
+### 签到失败
+
 如果失败，会输出类似`"result": "Failed"`的信息：
 
 ```
-2020-10-30T11:14:26 INFO sleep for 207 seconds ...
-2020-10-30T11:14:26 ERROR get uid failed, request is "{'data': None, 'message': '登录失效，请重新登录', 'retcode': -100}"
-2020-10-30T11:14:26 INFO {
+2020-11-17T22:11:33 INFO Sleep for 54 seconds ...
+2020-11-17T22:12:28 INFO UID is 102***054
+2020-11-17T22:12:29 INFO {
   "result": "Failed",
-  "message": ""{'data': None, 'message': '登录失效，请重新登录', 'retcode': -100}""
+  "message": "{\"data\": null, \"message\": \"请求异常\", \"retcode\": -401}"
 }
+Error: Process completed with exit code 255.
 ```
 
+同时你会收到一封来自GitHub、标题为`Run failed: Genshin Impact Helper - master`的邮件。
+
+## 更新
+
+因为请求上可能发生一些变化，所以上游源代码需要作出更改来适配这些变化，如果你没有更新项目源代码，会导致签到失败。更新的步骤如下。
+
+```
+git clone https://github.com/<Your GitHub ID>/genshin-impact-helper.git
+cd ./genshin-impact-helper
+git pull https://github.com/y1ndan/genshin-impact-helper.git master
+git push origin master
+```
+
+以上步骤可以在任意[Linux](https://zh.wikipedia.org/wiki/Linux)中执行，或者在[Windows](https://zh.wikipedia.org/wiki/Microsoft_Windows)中通过安装[Git](https://zh.wikipedia.org/wiki/Git)，之后在`Git Bash`软件中完成。
+
+> 1. Git可以在[此处](https://git-scm.com/downloads)下载，更多信息可以查阅[此处](https://git-scm.com/book/)。
+> 2. 更新完毕后，不需要重新部署Actions。
+
+## 说明
+
+此代码通过模拟浏览器使用Cookies登录米游社网页，点击页面完成签到来实现功能。签到功能通过官方公开的API实现，非游戏外挂。
+
 ## ❗️注意
 
-1. 程序会在每天早上自动执行签到流程，也可以随时通过上述`步骤4`手动触发
+1. 程序会在每天早上自动执行签到流程，也可以随时通过上述`步骤4`手动触发，具体时间参照[此处](.github/workflows/main.yml)
 2. 登录失效时，尝试重新更换`Cookie` 
 3. 支持多账号，不同`Cookie`之间用`#`分开即可
 4. 支持官服和 B 服
diff --git a/genshin.py b/genshin.py
index 3a04d46..dab3c2e 100755
--- a/genshin.py
+++ b/genshin.py
@@ -39,7 +39,7 @@ class Roles(object):
   def __init__(self, cookie:str=None):
     if type(cookie) is not str:
       raise TypeError("%s want a %s but got %s" %(
-          self.__class__, type(__name__), type(cookie)))
+        self.__class__, type(__name__), type(cookie)))
 
     self._cookie = cookie
     self._url = "https://api-takumi.mihoyo.com/binding/api/" \
@@ -52,17 +52,17 @@ class Roles(object):
             Conf.index_url, 'true', actid, 'bbs', 'mys', 'icon')
 
     return {
-        'User-Agent': Conf.ua,
-        'Referer': ref,
-        'Accept-Encoding': 'gzip, deflate, br',
-        'Cookie': self._cookie
+      'User-Agent': Conf.ua,
+      'Referer': ref,
+      'Accept-Encoding': 'gzip, deflate, br',
+      'Cookie': self._cookie
     }
 
   def get_roles(self):
     try:
       jdict = json.loads(
               requests.Session().get(
-                  self._url, headers = self.get_header()).text)
+                self._url, headers = self.get_header()).text)
     except Exception as e:
       logging.error(e)
       raise HTTPError
@@ -74,7 +74,7 @@ class Sign(object):
   def __init__(self, cookie:str=None):
     if type(cookie) is not str:
       raise TypeError("%s want a %s but got %s" %(
-          self.__class__, type(__name__), type(cookie)))
+        self.__class__, type(__name__), type(cookie)))
 
     self._url = 'https://api-takumi.mihoyo.com/event/bbs_sign_reward/sign'
 
@@ -140,30 +140,30 @@ class Sign(object):
             Conf.index_url, 'true', actid, 'bbs', 'mys', 'icon')
 
     return {
-        'x-rpc-device_id': str(uuid.uuid3(
-            uuid.NAMESPACE_URL, self._cookie)).replace('-','').upper(),
-        'x-rpc-client_type': '5',
-        'Accept-Encoding': 'gzip, deflate, br',
-        'User-Agent': Conf.ua,
-        'Referer': ref,
-        'x-rpc-app_version': Conf.app_version,
-        'DS': self.get_DS(),
-        'Cookie': self._cookie
+      'x-rpc-device_id': str(uuid.uuid3(
+        uuid.NAMESPACE_URL, self._cookie)).replace('-','').upper(),
+      'x-rpc-client_type': '5',
+      'Accept-Encoding': 'gzip, deflate, br',
+      'User-Agent': Conf.ua,
+      'Referer': ref,
+      'x-rpc-app_version': Conf.app_version,
+      'DS': self.get_DS(),
+      'Cookie': self._cookie
     }
 
   def run(self):
     logging.info('UID is %s' %(str(self._uid).replace(str(self._uid)[3:6],'***',1)))
 
     data = {
-        'act_id': 'e202009291139501',
-        'region': self._region,
-        'uid': self._uid
+      'act_id': 'e202009291139501',
+      'region': self._region,
+      'uid': self._uid
     }
 
     try:
       jdict = json.loads(requests.Session().post(
-          self._url, headers = self.get_header(),
-          data = json.dumps(data, ensure_ascii=False)).text)
+        self._url, headers = self.get_header(),
+        data = json.dumps(data, ensure_ascii=False)).text)
     except Exception as e:
       raise
 
@@ -182,8 +182,9 @@ def makeResult(result:str, data=None):
 
 if __name__ == "__main__":
   seconds = random.randint(10, 300)
-  logging.info('Sleep for %s seconds ...' %(seconds))
+  ret = -1
 
+  logging.info('Sleep for %s seconds ...' %(seconds))
   time.sleep(seconds)
 
   try:
@@ -204,7 +205,8 @@ if __name__ == "__main__":
   # -5003:    already signed in
   if code in [0, -5003]:
     result = makeResult('Success', jstr)
-    logging.info(result)
-  else:
-    logging.info(result)
-    exit(-100)
+    ret = 0
+
+  logging.info(result)
+  exit(ret)
+