diff --git a/CHANGELOG.md b/CHANGELOG.md
index 65e7dc5..87fc257 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+## 2.023
+- 自动更新
+- 修复保存任务时logger无法序列化的bug (感谢 @9chu)
+
 ## 2.022
 - 增加下载速度显示
 - 增加低速自动重试 `low_speed_threshold`, 默认为`10KB/s`以下重试
diff --git a/README.chs.md b/README.chs.md
index dde2f73..a50a7be 100755
--- a/README.chs.md
+++ b/README.chs.md
@@ -55,6 +55,8 @@ xeH
  - **download_timeout** 设置下载图片的超时，默认为`10`秒
  - **low_speed_threshold** 设置最低下载速度，低于此值将换源重新下载，单位为KB/s，默认为`10`
  - **ignored_errors** 设置忽略的错误码，默认为空，错误码可以从`const.py`中获得
+ - **auto_update** 自动检查更新，`check` 仅检查更新，`download` 下载更新，`off` 关闭检查；默认为`download`
+ - **update_beta_channel** 设置是否更新到测试版，默认为否
  - **log_path** 日志路径，默认为`eh.log`
  - **log_verbose** 日志等级，可选1-3，值越大输出越详细，默认为`2`
  - **save_tasks** 是否保存任务到`h.json`，可用于断点续传，默认为否
@@ -67,7 +69,8 @@ xeH
            [--rpc-interface ADDR] [--rpc-port PORT] [--rpc-secret ...]
            [--rpc-open-browser BOOL] [--delete-task-files BOOL] [-a BOOL]
            [--download-range a-b,c-d,e] [-t N] [--timeout N]
-           [--low-speed-threshold N] [-f] [-l /path/to/eh.log] [-v] [-h]
+           [--low-speed-threshold N] [-f] [--auto-update {check,download,off}]
+           [--update-beta-channel BOOL] [-l /path/to/eh.log] [-v] [-h]
            [--version]
            [url [url ...]]
 
@@ -112,6 +115,10 @@ xeH
   -t N, --thread N      下载线程数 (默认: 5)
   --timeout N           设置下载图片的超时 (默认: 10秒)
   -f, --force           忽略配额判断, 继续下载 (默认: False)
+  --auto-update {check,download,off}
+                        检查并自动下载更新
+  --update-beta-channel BOOL
+                        是否更新到测试分支
   -l /path/to/eh.log, --logpath /path/to/eh.log
                         保存日志的路径 (默认: eh.log)
   -v, --verbose         设置日志装逼等级 (默认: 2)
diff --git a/README.md b/README.md
index 274f70b..c7e62fe 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,8 @@ Configuration keys：
  - **download_timeout** Timeout of download images. Default to `10`s.
  - **low_speed_threshold** Retry download if speed is lower than specified value. Default to `10` KB/s.
  - **ignored_errors** Set the error codes to ignore and continue downloading. Default to *empty*. Error codes can be obtained from [const.py](xeHentai/const.py).
+ - **auto_update** turn on auto update of program `check` for check only and `download` for download; `off` to turn off. Default to `download`.
+ - **update_beta_channel** set to true to update to dev branch
  - **log_path** Set log file path. Default to `eh.log`.
  - **log_verbose** Set log level with integer from 1 to 3. Bigger value means more verbose output. Default to `2`.
  - **save_tasks** Set to save uncompleted tasks in `h.json`. Default to `False`.
@@ -65,7 +67,8 @@ Usage: xeh [-u USERNAME] [-k KEY] [-c COOKIE] [-i] [--daemon] [-d DIR] [-o]
            [--rpc-interface ADDR] [--rpc-port PORT] [--rpc-secret ...]
            [--rpc-open-browser BOOL] [--delete-task-files BOOL] [-a BOOL]
            [--download-range a-b,c-d,e] [-t N] [--timeout N]
-           [--low-speed-threshold N] [-f] [-l /path/to/eh.log] [-v] [-h]
+           [--low-speed-threshold N] [-f] [--auto-update {check,download,off}]
+           [--update-beta-channel BOOL] [-l /path/to/eh.log] [-v] [-h]
            [--version]
            [url [url ...]]
 
@@ -126,9 +129,14 @@ optional arguments:
                         (default: 10 KB/s)
   -f, --force           download regardless of quota exceeded warning
                         (default: False)
+  --auto-update {check,download,off}
+                        check or download update automatically
+                        (default: download)
+  --update-beta-channel BOOL
+                        check update upon beta channel
+                        (default: True)
   -l /path/to/eh.log, --logpath /path/to/eh.log
-                        define log path (current:
-                        /Users/fffonion/Dev/Python/xeHentai/eh.log)
+                        define log path (default: eh.log)
   -v, --verbose         show more detailed log (default: 3)
   -h, --help            show this help message and exit
   --version             show program's version number and exit
diff --git a/setup.py b/setup.py
index 3a7a878..d06e871 100644
--- a/setup.py
+++ b/setup.py
@@ -22,6 +22,7 @@
     'xeHentai',
     'xeHentai.util',
     'xeHentai.i18n',
+    'xeHentai.updater',
 ]
 requires = ['requests']
 
diff --git a/xeH b/xeH
index 4dfa5ab..a92fa37 100755
--- a/xeH
+++ b/xeH
@@ -1,5 +1,49 @@
 #!/usr/bin/env python
 
-from xeHentai import cli
+import os
+import sys
+import json
+import zipfile
+from threading import Thread
+import xeHentai.const as const
 
-cli.start()
+SRC_UPDATE_FILE = const.SRC_UPDATE_FILE
+if const.PY3K:
+    from importlib import reload
+
+def load_update():
+    if os.path.exists(SRC_UPDATE_FILE):
+        try:
+            need_remove = False
+            update_id = ""
+            with zipfile.ZipFile(SRC_UPDATE_FILE, 'r') as z:
+                try:
+                   r = json.loads(z.read("info.json"))
+                except:
+                    need_remove = True
+                else:
+                    if 'v' not in r and r['v'] != SRC_UPDATE_VERSION:
+                        # ignoring legacy file
+                        need_remove = True
+                    else:
+                        update_id = r["update_id"]
+            if need_remove:
+                os.remove(SRC_UPDATE_FILE)
+                return
+            v = const.__version__
+            sys.path.insert(0, SRC_UPDATE_FILE)
+            import xeHentai
+            reload(xeHentai)
+            xeHentai.const.VERSION_UPDATE = update_id
+            xeHentai.const.VERSION_UPDATE_LOADER = v
+        except:
+            if sys.path[0] == SRC_UPDATE_FILE:
+                sys.path.pop(0)
+                os.remove(SRC_UPDATE_FILE)
+
+
+if __name__ == "__main__":
+    load_update()
+
+    from xeHentai import cli, i18n
+    cli.start()
diff --git a/xeH.py b/xeH.py
index 4dfa5ab..a92fa37 100755
--- a/xeH.py
+++ b/xeH.py
@@ -1,5 +1,49 @@
 #!/usr/bin/env python
 
-from xeHentai import cli
+import os
+import sys
+import json
+import zipfile
+from threading import Thread
+import xeHentai.const as const
 
-cli.start()
+SRC_UPDATE_FILE = const.SRC_UPDATE_FILE
+if const.PY3K:
+    from importlib import reload
+
+def load_update():
+    if os.path.exists(SRC_UPDATE_FILE):
+        try:
+            need_remove = False
+            update_id = ""
+            with zipfile.ZipFile(SRC_UPDATE_FILE, 'r') as z:
+                try:
+                   r = json.loads(z.read("info.json"))
+                except:
+                    need_remove = True
+                else:
+                    if 'v' not in r and r['v'] != SRC_UPDATE_VERSION:
+                        # ignoring legacy file
+                        need_remove = True
+                    else:
+                        update_id = r["update_id"]
+            if need_remove:
+                os.remove(SRC_UPDATE_FILE)
+                return
+            v = const.__version__
+            sys.path.insert(0, SRC_UPDATE_FILE)
+            import xeHentai
+            reload(xeHentai)
+            xeHentai.const.VERSION_UPDATE = update_id
+            xeHentai.const.VERSION_UPDATE_LOADER = v
+        except:
+            if sys.path[0] == SRC_UPDATE_FILE:
+                sys.path.pop(0)
+                os.remove(SRC_UPDATE_FILE)
+
+
+if __name__ == "__main__":
+    load_update()
+
+    from xeHentai import cli, i18n
+    cli.start()
diff --git a/xeHentai/cli.py b/xeHentai/cli.py
index 77da138..28ce37b 100644
--- a/xeHentai/cli.py
+++ b/xeHentai/cli.py
@@ -26,6 +26,11 @@
 def start():
     opt = parse_opt()
     xeH = xeHentai()
+    if opt.auto_update != "off":
+        check_update(xeH.logger, {
+            "auto_update": opt.auto_update,
+            "update_beta_channel": opt.update_beta_channel,
+        })
     if opt.daemon:
         if opt.interactive:
             xeH.logger.warning(i18n.XEH_OPT_IGNORING_I)
@@ -44,6 +49,13 @@ def start():
     else:
         main(xeH, opt)
 
+def check_update(l, cfg):
+    from .updater.updater import check_update
+    t = Thread(name="updater", target=check_update, args=(l, cfg))
+    t.setDaemon(True)
+    t.start()
+    return t
+
 def main(xeH, opt):
     xeH.update_config(**vars(opt))
     log = xeH.logger
@@ -181,6 +193,10 @@ def parse_opt():
                         current = ERR_QUOTA_EXCEEDED in _def['ignored_errors'],
                         add_value = ERR_QUOTA_EXCEEDED, dest='ignored_errors',
                         help = i18n.XEH_OPT_f)
+    parser.add_argument('--auto-update', default = _def['auto_update'], choices = ("check", "download", "off"),
+                        dest = 'auto_update', help = i18n.XEH_OPT_auto_update)
+    parser.add_argument('--update-beta-channel', type = bool, metavar = "BOOL", default = _def['update_beta_channel'],
+                        dest = 'update_beta_channel', help = i18n.XEH_OPT_update_beta_channel)
 
     parser.add_argument('-l', '--logpath', metavar = '/path/to/eh.log',
                         default = os.path.abspath(_def['log_path']), help = i18n.XEH_OPT_l)
diff --git a/xeHentai/config.py b/xeHentai/config.py
index 3f540d6..3af4545 100644
--- a/xeHentai/config.py
+++ b/xeHentai/config.py
@@ -66,4 +66,9 @@
 delete_task_files = False
 
 # retry a connection if per thread speed is lower than this value, unit is KB per second
-low_speed_threshold = 10
\ No newline at end of file
+low_speed_threshold = 10
+
+# turn on auto update of program "check" for check only and "download" for download
+auto_update = "download"
+# set to true to update to dev branch
+update_beta_channel = False
\ No newline at end of file
diff --git a/xeHentai/const.py b/xeHentai/const.py
index e7e2b3b..1b99ff4 100644
--- a/xeHentai/const.py
+++ b/xeHentai/const.py
@@ -16,8 +16,9 @@
 CODEPAGE = locale.getdefaultlocale()[1] or 'ascii'
 ANDROID = 'ANDROID_ARGUMENT' in os.environ
 
-__version__ = 2.022
-DEVELOPMENT = False
+__version__ = 2.023
+VERSION_UPDATE = ""
+DEVELOPMENT = True
 
 SCRIPT_NAME = "xeHentai"
 
@@ -29,6 +30,9 @@
     # The application is not frozen
     # Change this bit to match where you store your data files:
     FILEPATH = sys.path[0]
+    # if update is being injected
+    if FILEPATH.endswith(".zip"):
+        FILEPATH = sys.path[1]
 
 DUMMY_FILENAME = "-dummy-"
 RENAME_TMPDIR = "-xeh-conflict-"
@@ -37,6 +41,9 @@
 STATIC_CACHE_TTL = 3600
 STATIC_CACHE_VERSION = 1
 
+SRC_UPDATE_FILE = os.path.join(FILEPATH, "src.zip")
+SRC_UPDATE_VERSION = 1
+
 RE_INDEX = re.compile('.+/(\d+)/([^\/]+)/*')
 RE_GALLERY = re.compile('/([a-f0-9]{10})/[^\-]+\-(\d+)')
 RE_IMGHASH = re.compile('/([a-f0-9]{40})-(\d+)-(\d+)-(\d+)-([a-z]{,4})')
diff --git a/xeHentai/core.py b/xeHentai/core.py
index 5a03e91..3335e55 100644
--- a/xeHentai/core.py
+++ b/xeHentai/core.py
@@ -37,6 +37,8 @@
 class xeHentai(object):
     def __init__(self):
         self.verstr = "%.3f%s" % (__version__, '-dev' if DEVELOPMENT else "")
+        if VERSION_UPDATE:
+            self.verstr = "%s-%s(%s)" % (self.verstr, VERSION_UPDATE[:7], VERSION_UPDATE_LOADER)
         self.logger = logger.Logger()
         self._exit = False
         self.tasks = Queue() # for queueing, stores gid only
diff --git a/xeHentai/i18n/en_us.py b/xeHentai/i18n/en_us.py
index 5f9731f..f73a66a 100644
--- a/xeHentai/i18n/en_us.py
+++ b/xeHentai/i18n/en_us.py
@@ -70,6 +70,8 @@
 XEH_OPT_h = "show this help message and exit"
 XEH_OPT_version = "show program's version number and exit"
 XEH_OPT_IGNORING_I = "ignoring -i option in daemon mode"
+XEH_OPT_auto_update = "check or download update automatically"
+XEH_OPT_update_beta_channel = "check update upon beta channel"
 
 PS_LOGIN = "login to exhentai (y/n)? > "
 PS_USERNAME = "Username > "
@@ -135,3 +137,13 @@
 QUEUE = "queue"
 
 PROXY_DISABLE_BANNED = "disable a banned proxy, expire in about %ss"
+
+UPDATE_CHANNEL = "Update channel is: %s"
+UPDATE_DEV_CHANNEL = "dev"
+UPDATE_RELEASE_CHANNEL = "release"
+UPDATE_FAILED = "Failure when updating program: %s"
+UPDATE_COMPLETE = "Update is complete, it will take effect on next run"
+UPDATE_NO_UPDATE = "Program is up-to-date"
+UPDATE_AVAILABLE = "Update available: %s \"%s\" (%s)"
+UPDATE_DOWNLOAD_MANUALLY = "You can download update from https://dl.yooooo.us/share/xeHentai/"
+
diff --git a/xeHentai/i18n/zh_hans.py b/xeHentai/i18n/zh_hans.py
index faea1c8..e518b79 100644
--- a/xeHentai/i18n/zh_hans.py
+++ b/xeHentai/i18n/zh_hans.py
@@ -67,6 +67,8 @@
 XEH_OPT_h = "显示本帮助信息"
 XEH_OPT_version = "显示版本信息"
 XEH_OPT_IGNORING_I = "后台模式已忽略 -i 参数"
+XEH_OPT_auto_update = "检查并自动下载更新"
+XEH_OPT_update_beta_channel = "是否更新到测试分支"
 
 
 PS_LOGIN = "当前没有登陆，要登陆吗 (y/n)? > "
@@ -133,3 +135,12 @@
 QUEUE = "队列"
 
 PROXY_DISABLE_BANNED = "禁用了一个被ban的代理，将在约%s秒后恢复"
+
+UPDATE_CHANNEL = "更新渠道为: %s"
+UPDATE_DEV_CHANNEL = "测试版"
+UPDATE_RELEASE_CHANNEL = "正式版"
+UPDATE_FAILED = "更新时遇到错误: %s"
+UPDATE_COMPLETE = "更新完成，请重新启动程序应用更新"
+UPDATE_NO_UPDATE = "没有可用更新"
+UPDATE_AVAILABLE = "发现可用的更新: 发布于 %s \"%s\" (%s)"
+UPDATE_DOWNLOAD_MANUALLY = "可以从 https://dl.yooooo.us/share/xeHentai/ 下载更新"
diff --git a/xeHentai/i18n/zh_hant.py b/xeHentai/i18n/zh_hant.py
index 696f854..788c1f0 100644
--- a/xeHentai/i18n/zh_hant.py
+++ b/xeHentai/i18n/zh_hant.py
@@ -67,6 +67,8 @@
 XEH_OPT_h = "顯示本幫助信息"
 XEH_OPT_version = "顯示版本信息"
 XEH_OPT_IGNORING_I = "後台模式已忽略 -i 參數"
+XEH_OPT_auto_update = "檢查並自動下載更新"
+XEH_OPT_update_beta_channel = "是否更新到測試分支"
 
 
 PS_LOGIN = "當前沒有登陸，要登陸嗎 (y/n)? > "
@@ -133,3 +135,12 @@
 QUEUE = "隊列"
 
 PROXY_DISABLE_BANNED = "禁用了一個被ban的代理，將在約%s秒後恢復"
+
+UPDATE_CHANNEL = "更新渠道為: %s"
+UPDATE_DEV_CHANNEL = "測試版"
+UPDATE_RELEASE_CHANNEL = "正式版"
+UPDATE_FAILED = "更新時遇到錯誤: %s"
+UPDATE_COMPLETE = "更新完成，請重新啟動程序應用更新"
+UPDATE_NO_UPDATE = "沒有可用更新"
+UPDATE_AVAILABLE = "發現可用的更新: 發布於 %s \"%s\" (%s)"
+UPDATE_DOWNLOAD_MANUALLY = "可以從 https://dl.yooooo.us/share/xeHentai/ 下載更新"
diff --git a/xeHentai/rpc.py b/xeHentai/rpc.py
index a1e0ebd..c93e7e7 100644
--- a/xeHentai/rpc.py
+++ b/xeHentai/rpc.py
@@ -19,7 +19,6 @@
 if PY3K:
     from socketserver import ThreadingMixIn
     from http.server import HTTPServer, BaseHTTPRequestHandler
-    from io import IOBase
     from io import BytesIO as StringIO
     from urllib.parse import urlparse
 else:
diff --git a/xeHentai/updater/__init__.py b/xeHentai/updater/__init__.py
new file mode 100644
index 0000000..c637c8b
--- /dev/null
+++ b/xeHentai/updater/__init__.py
@@ -0,0 +1,18 @@
+# coding:utf-8
+# Contributor:
+#      fffonion        <fffonion@gmail.com>
+
+class Updater(object):
+    def get_latest_release(self, dev=False):
+        raise NotImplementedError("get_latest_release not implemented")
+
+    def get_src_path_in_archive(self, info):
+        raise NotImplementedError("get_src_path_in_archive not implemented")
+
+class UpdateInfo(object):
+    def __init__(self, update_id, download_link, ts, message):
+        self.update_id = update_id
+        self.download_link = download_link
+        self.message = message
+        self.ts = ts
+
diff --git a/xeHentai/updater/github.py b/xeHentai/updater/github.py
new file mode 100644
index 0000000..9052c70
--- /dev/null
+++ b/xeHentai/updater/github.py
@@ -0,0 +1,29 @@
+# coding:utf-8
+# Contributor:
+#      fffonion        <fffonion@gmail.com>
+
+import requests
+import time
+
+from . import Updater, UpdateInfo
+
+class GithubUpdater(Updater):
+    def __init__(self, session):
+        self.session = session
+
+    def get_latest_release(self, dev=False):
+        param = dev and "dev" or "master"
+        r = self.session.get("https://api.github.com/repos/fffonion/xeHentai/commits?sha=%s" % param)
+        commit = r.json()[0]
+        sha = commit["sha"]
+        url = "https://github.com/fffonion/xeHentai/archive/%s.zip" % sha
+
+        return UpdateInfo(
+            sha,
+            url,
+            commit["commit"]["author"]["date"],
+            commit["commit"]["message"].replace("\r", " ").replace("\n", " "),
+        )
+
+    def get_src_path_in_archive(self, info):
+        return "xeHentai-%s/xeHentai" % info.update_id
diff --git a/xeHentai/updater/updater.py b/xeHentai/updater/updater.py
new file mode 100644
index 0000000..4fe5a36
--- /dev/null
+++ b/xeHentai/updater/updater.py
@@ -0,0 +1,63 @@
+# coding:utf-8
+# Contributor:
+#      fffonion        <fffonion@gmail.com>
+
+import os
+import requests
+import zipfile
+import json
+from ..i18n import i18n
+from ..util import logger
+from ..const import *
+from .. import const
+from .github import GithubUpdater
+from . import UpdateInfo
+
+if PY3K:
+    from io import BytesIO as StringIO
+else:
+    from cStringIO import StringIO 
+
+def check_update(l=None, config={}):
+    if not l:
+        l = logger.Logger()
+    dev = "update_beta_channel" in config and config["update_beta_channel"]
+    download_update = "auto_update" in config and config["auto_update"] == "download"
+    l.debug(i18n.UPDATE_CHANNEL % (dev and i18n.UPDATE_DEV_CHANNEL or i18n.UPDATE_RELEASE_CHANNEL))
+    s = requests.Session()
+    g = GithubUpdater(s)
+    try:
+        info = g.get_latest_release(dev)
+        if hasattr(const, "VERSION_UPDATE") and VERSION_UPDATE == info.update_id:
+            l.debug(i18n.UPDATE_NO_UPDATE)
+            return
+        l.info(i18n.UPDATE_AVAILABLE % (info.ts, info.message, info.update_id))
+        if not download_update:
+            l.info(i18n.UPDATE_DOWNLOAD_MANUALLY)
+            return
+        resp = s.get(info.download_link)
+        z = resp.content
+        with zipfile.ZipFile(StringIO(z)) as zf:
+            make_src_update_file(zf, g.get_src_path_in_archive(info), info)
+        l.info(i18n.UPDATE_COMPLETE)
+    except MemoryError as ex:
+        l.warn(i18n.UPDATE_FAILED % str(ex))
+
+
+def make_src_update_file(infile, path, info):
+    if not path.endswith("/"):
+        path += "/"
+    
+    with zipfile.ZipFile(SRC_UPDATE_FILE, "w") as z:
+        z.writestr(
+            "info.json",
+            json.dumps({
+                "v": SRC_UPDATE_VERSION,
+                "update_id": info.update_id,
+            }),
+            zipfile.ZIP_STORED,
+        )
+
+        for f in infile.namelist():
+            if f.startswith(path) and not f.endswith("/"):
+                z.writestr("xeHentai/%s" % f[len(path):], infile.read(f), zipfile.ZIP_STORED)
\ No newline at end of file