diff --git a/.travis.yml b/.travis.yml
index 7e492f9..a998667 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 if: 'tag IS blank'
 env:
     global:
-        - TRAVIS_TAG=v2.2
+        - TRAVIS_TAG=v2.3
 jobs:
     include:
         -
diff --git a/LICENSE b/LICENSE
index f9cdb9b..c74b89c 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2018-2019 Hsury
+Copyright (c) 2018-2020 Hsury
 
 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 29969f6..2fb8952 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 <h1 align="center">- Bilibili Toolkit -</h1>
 
 <p align="center">
-<img src="https://img.shields.io/badge/version-2020.7.2-green.svg?longCache=true&style=for-the-badge">
+<img src="https://img.shields.io/badge/version-2020.7.4-green.svg?longCache=true&style=for-the-badge">
 <img src="https://img.shields.io/badge/license-SATA-blue.svg?longCache=true&style=for-the-badge">
 <img src="https://img.shields.io/travis/com/Hsury/Bilibili-Toolkit?style=for-the-badge">
 </p>
@@ -20,7 +20,7 @@
 
 |组件                |版本           |描述                          |
 |--------------------|---------------|------------------------------|
-|login               |2019/12/22     |登录                          |
+|login               |2020/7/4       |登录                          |
 |get_user_info       |2019/9/15      |获取用户信息                  |
 |set_privacy         |2018/7/24      |修改隐私设置                  |
 |silver_to_coin      |2018/8/8       |银瓜子兑换硬币                |
diff --git a/bilibili.py b/bilibili.py
index 801b2c4..e20755d 100644
--- a/bilibili.py
+++ b/bilibili.py
@@ -40,10 +40,10 @@
 __author__ = "Hsury"
 __email__ = "i@hsury.com"
 __license__ = "SATA"
-__version__ = "2020.7.2"
+__version__ = "2020.7.4"
 
 class Bilibili:
-    app_key = "1d8b6e7d45233436"
+    app_key = "bca7e84c2d947ac6"
     patterns = {
         'video': {
             'id': 1,
@@ -65,7 +65,7 @@ class Bilibili:
 
     def __init__(self, https=True, queue=None):
         self._session = requests.Session()
-        self._session.headers.update({'User-Agent': "Mozilla/5.0 BiliDroid/5.51.1 (bbcallen@gmail.com)"})
+        self._session.headers.update({'User-Agent': "Mozilla/5.0 BiliDroid/6.4.0 (bbcallen@gmail.com) os/android model/M1903F11I mobi_app/android build/6040500 channel/bili innerVer/6040500 osVer/9.0.0 network/2"})
         self.__queue = queue
         self.get_cookies = lambda: self._session.cookies.get_dict(domain=".bilibili.com")
         self.get_csrf = lambda: self.get_cookies().get("bili_jct", "")
@@ -123,7 +123,7 @@ def __push_to_queue(self, manufacturer, data):
 
     @staticmethod
     def calc_sign(param):
-        salt = "560c52ccd288fed045859ed18bffd973"
+        salt = "60698ba2f68e01ce44738920a0ffe768"
         sign_hash = hashlib.md5()
         sign_hash.update(f"{param}{salt}".encode())
         return sign_hash.hexdigest()
@@ -235,7 +235,11 @@ def get_key():
                                     time.sleep(10)
                                 break
                         elif response['code'] == -449:
-                            time.sleep(1)
+                            self._log("服务繁忙, 尝试使用V3接口登录")
+                            url = f"{self.protocol}://passport.bilibili.com/api/v3/oauth2/login"
+                            param = f"access_key=&actionKey=appkey&appkey={Bilibili.app_key}&build=6040500&captcha=&challenge=&channel=bili&cookies=&device=phone&mobi_app=android&password={parse.quote_plus(base64.b64encode(rsa.encrypt(f'{key_hash}{self.password}'.encode(), pub_key)))}&permission=ALL&platform=android&seccode=&subid=1&ts={int(time.time())}&username={parse.quote_plus(self.username)}&validate="
+                            payload = f"{param}&sign={self.calc_sign(param)}"
+                            headers = {'Content-type': "application/x-www-form-urlencoded"}
                             response = self._requests("post", url, data=payload, headers=headers)
                         elif response['code'] == 0 and response['data']['status'] == 0:
                             for cookie in response['data']['cookie_info']['cookies']: