diff --git a/README.md b/README.md
index 5356661..2251650 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 # docker-seafile-client
-Docker image for Seafile terminal client.
+Docker image for [Seafile CLI client](https://help.seafile.com/syncing_client/linux-cli/).
 
 ### Docker-compose example:
 ```yaml
@@ -25,10 +25,20 @@ volumes:
 ```
 
 ### Environment variables:
- - `LIBRARY_ID` - library to sync, ID or name. Multiple libraries could be separated by colon `:`.
- - `SERVER_HOST` - hostname of your Seafile server, eg: `seafile.example.com`. If you're using non-standard port, you can specify it here, eg: `seafile.example.com:8080`.
- - `USERNAME`/ `PASSWORD` - credentials to access Seafile server.
- - `SEAFILE_UID` / `SEAFILE_GID` - UID/GID of user inside container. You can use it to set permissions on synced files. Default values are `1000`/`1000`.
+ - `LIBRARY_ID` - library to sync, ID or name. Multiple libraries could be
+ separated by colon `:`.
+ - `SERVER_HOST` - hostname of your Seafile server, eg: _seafile.example.com_.
+ If you're using non-standard port, you can specify it here,
+ eg: _seafile.example.com:8080_.
+ - `USERNAME` / `PASSWORD` - credentials to access Seafile server.
+ - `SEAFILE_UID` / `SEAFILE_GID` - UID/GID of user inside container. You can
+ use it to set permissions on synced files. Default values are _1000_ / _1000_.
+ - `DELETE_CONFIRM_THRESHOLD` - represents the number of files that require
+ confirmation before being deleted simultaneously. Default value is _500_.
+ - `DISABLE_VERIFY_CERTIFICATE` - set to _true_ to disable server's certificate
+ verification. Default value is _false_.
+ - `UPLOAD_LIMIT` / `DOWNLOAD_LIMIT` -  upload/download speed limit in B/s
+ (bytes per second). Default values are _0_ (unlimited).
 
 ### Volumes:
  - `/dsc/seafile-data`  Seafile client data directory (sync status, etc).
@@ -36,11 +46,23 @@ volumes:
 
 
 ### Some notes
-`LIBRARY_ID` could be library ID or library name. Library ID is a 36-character string, which is a part of URI when you open library in webUI. Library name is a name you gave to library when you created it.
+`LIBRARY_ID` could be library ID or library name. Library ID is a 36-character
+ string, which is a part of URI when you open library in webUI. Library name is
+ a name you gave to library when you created it.
 
-Libraries will be synced in subdirectories of `/dsc/seafile` directory inside container. You can mount it to host directory to access files.
+Libraries will be synced in subdirectories of `/dsc/seafile` directory inside
+ container. You can mount it to host directory to access files.
 
-`hostname` parameter is optional, but it's recommended to set it to some unique value, it will be shown in Seafile webUI as client name (`terminal-dsc` in given example).
+`hostname` parameter is optional, but it's recommended to set it to some unique
+ value, it will be shown in Seafile webUI as client name (`terminal-dsc` in
+ given example).
 
-`sync-data` volume is optional too, but it's recommended to use it. Otherwise, sync status will be lost when container is recreated.
+`sync-data` volume is optional too, but it's recommended to use it. Otherwise,
+ sync status will be lost when container is recreated.
 
+At the moment there is no suitable way to confirm deletion of large number of
+ files. So, if you're going to delete a lot of files, you should set
+ `DELETE_CONFIRM_THRESHOLD` to some larger value.
+
+### Links
+- [Official Seafile CLI client documentation](https://help.seafile.com/syncing_client/linux-cli/)
diff --git a/dsc/client.py b/dsc/client.py
index d90b08a..625f82b 100644
--- a/dsc/client.py
+++ b/dsc/client.py
@@ -1,3 +1,4 @@
+import argparse
 import logging
 import os
 import subprocess
@@ -90,6 +91,19 @@ class SeafileClient:
 
         _lg.info("Seafile daemon is ready")
 
+    def stop_daemon(self):
+        cmd = "seaf-cli stop"
+        _lg.info("Stopping seafile daemon: %s", cmd)
+        subprocess.run(self.__gen_cmd(cmd))
+        _lg.info("Waiting for seafile daemon to stop")
+
+        while True:
+            if not self.daemon_ready:
+                break
+            time.sleep(5)
+
+        _lg.info("Seafile daemon is stopped")
+
     def get_library_id(self, library) -> Optional[str]:
         for lib_id, lib_name in self.remote_libraries.items():
             if library in (lib_id, lib_name):
@@ -152,3 +166,37 @@ class SeafileClient:
             lib_name, lib_id, lib_path = line.rsplit(maxsplit=3)
             local_libs.add(lib_id)
         return local_libs
+
+    def configure(self, args: argparse.Namespace, check_for_daemon: bool = True):
+        need_restart = False
+        # Options can be fetched or set only when daemon is running
+        if check_for_daemon and not self.daemon_ready:
+            self.start_daemon()
+
+        for key, value in args.__dict__.items():
+            if key not in const.AVAILABLE_SEAFCLI_OPTIONS:
+                continue
+
+            # check current value
+            cmd = f"seaf-cli config -k {key}"
+            _lg.info("Checking seafile client option: %s", cmd)
+            proc = subprocess.run(self.__gen_cmd(cmd), stdout=subprocess.PIPE)
+            # stdout looks like "option = value"
+            cur_value = proc.stdout.decode().strip()
+            try:
+                cur_value = cur_value.split(sep="=")[1].strip()
+            except IndexError:
+                cur_value = None
+            if cur_value == str(value):
+                continue
+
+            # set new value
+            cmd = f"seaf-cli config -k {key} -v {value}"
+            _lg.info("Setting seafile client option: %s", cmd)
+            subprocess.run(self.__gen_cmd(cmd))
+            need_restart = True
+
+        if need_restart:
+            _lg.info("Restarting seafile daemon")
+            self.stop_daemon()
+            self.start_daemon()
diff --git a/dsc/const.py b/dsc/const.py
index 66ffdef..15b800f 100644
--- a/dsc/const.py
+++ b/dsc/const.py
@@ -3,3 +3,10 @@ DEFAULT_LIBS_DIR = "/dsc/seafile"
 DEPRECATED_LIBS_DIR = "/data"
 DEFAULT_USERNAME = "seafile"
 STATUS_POLL_PERIOD = 1
+
+AVAILABLE_SEAFCLI_OPTIONS = {
+    "delete_confirm_threshold",
+    "disable_verify_certificate",
+    "upload_limit",
+    "download_limit",
+}
diff --git a/start.py b/start.py
index 6dddc16..8990974 100755
--- a/start.py
+++ b/start.py
@@ -16,28 +16,54 @@ def main():
     logging.basicConfig(format="%(asctime)s %(message)s", level=logging.INFO)
 
     parser = argparse.ArgumentParser()
-    parser.add_argument("--uid", default=os.getenv("SEAFILE_UID", default=1000), type=int)
-    parser.add_argument("--gid", default=os.getenv("SEAFILE_GID", default=1000), type=int)
-    parser.add_argument("--host", default=os.getenv("SERVER_HOST"))
-    parser.add_argument("--username", default=os.getenv("USERNAME"))
-    parser.add_argument("--password", default=os.getenv("PASSWORD"))
-    parser.add_argument("--libs", default=os.getenv("LIBRARY_ID"))
+    parser.add_argument("-s", "--server")
+    parser.add_argument("-u", "--username")
+    parser.add_argument("-p", "--password")
+    parser.add_argument("-l", "--libraries")
+    parser.add_argument("--uid", type=int)
+    parser.add_argument("--gid", type=int)
+    parser.add_argument("--upload-limit", type=int, default=0)
+    parser.add_argument("--download-limit", type=int, default=0)
+    parser.add_argument("--disable-verify-certificate", action="store_true")
+    parser.add_argument("--delete-confirm-threshold", type=int, default=500)
+
+    parser.set_defaults(
+        server=os.getenv("SERVER_HOST"),
+        username=os.getenv("USERNAME"),
+        password=os.getenv("PASSWORD"),
+        libraries=os.getenv("LIBRARY_ID"),
+        uid=os.getenv("SEAFILE_UID", default=1000),
+        gid=os.getenv("SEAFILE_GID", default=1000),
+        upload_limit=os.getenv("UPLOAD_LIMIT"),
+        download_limit=os.getenv("DOWNLOAD_LIMIT"),
+        disable_verify_certificate=os.getenv("DISABLE_VERIFY_CERTIFICATE") in ("true", "1", "True"),
+        delete_confirm_threshold=os.getenv("DELETE_CONFIRM_THRESHOLD"),
+    )
     args = parser.parse_args()
+    if not args.server:
+        parser.error("Seafile server is not specified")
+    if not args.username:
+        parser.error("username is not specified")
+    if not args.password:
+        parser.error("password is not specified")
+    if not args.libraries:
+        parser.error("library is not specified")
 
     setup_uid(args.uid, args.gid)
     create_dir(const.DEFAULT_APP_DIR)
 
-    client = SeafileClient(args.host, args.username, args.password, const.DEFAULT_APP_DIR)
+    client = SeafileClient(args.server, args.username, args.password, const.DEFAULT_APP_DIR)
     client.init_config()
     client.start_daemon()
+    client.configure(args, check_for_daemon=False)
 
     libs_to_sync = set()
-    for arg_lib in args.libs.split(sep=":"):
+    for arg_lib in args.libraries.split(sep=":"):
         lib_id = client.get_library_id(arg_lib)
         if lib_id:
             libs_to_sync.add(lib_id)
         else:
-            _lg.warning("Library %s is not found on server %s", arg_lib, args.host)
+            _lg.warning("Library %s is not found on server %s", arg_lib, args.server)
 
     # don't start to sync libraries already in sync
     libs_to_sync -= client.get_local_libraries()
@@ -55,6 +81,7 @@ def main():
         client.sync_lib(lib_id, libs_dir)
     client.watch_status()
 
+    client.stop_daemon()
     return 0