diff --git a/setup.py b/setup.py
index ee40e77..1317f84 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,6 @@ setup(name='uncloud_cli',
       packages=find_packages(),
       install_requires=[
           'requests',
-          'python-decouple',
           'pyotp',
           'click'
       ],
diff --git a/uncloud_cli/commands/helper.py b/uncloud_cli/commands/helper.py
index c7661c9..14ac530 100755
--- a/uncloud_cli/commands/helper.py
+++ b/uncloud_cli/commands/helper.py
@@ -26,7 +26,7 @@ def make_request(*args, data=None, request_method=requests.post):
         print('Error occurred while getting output from api server.')
 
 
-def get_token(ctx, param, value):
+def get_token(_, param, value):
     if value is not None:
         try:
             token = TOTP(value).now()
diff --git a/uncloud_cli/commands/network.py b/uncloud_cli/commands/network.py
index 978ec75..e81d2bf 100644
--- a/uncloud_cli/commands/network.py
+++ b/uncloud_cli/commands/network.py
@@ -1,7 +1,6 @@
-from uncloud_cli.commands.helper import add_otp_options, make_request
-
 import click
-import requests
+
+from uncloud_cli.commands.helper import add_otp_options, make_request
 
 
 @click.group()