diff --git a/youtube_dl/extractor/vier_auth_aws.py b/youtube_dl/extractor/vier_auth_aws.py
index f5b9b14ab..ab7241f27 100644
--- a/youtube_dl/extractor/vier_auth_aws.py
+++ b/youtube_dl/extractor/vier_auth_aws.py
@@ -1,16 +1,14 @@
 # coding: utf-8
-from __future__ import unicode_literals
+from __future__ import absolute_import, division, unicode_literals
 
 # Taken from https://github.com/add-ons/plugin.video.viervijfzes/blob/master/resources/lib/viervijfzes/auth_awsidp.py
 # with some small modifications (replacement of six and requests, removal of unused function, reformatting)
 # This file is licensed as GPL-3 from https://github.com/add-ons/plugin.video.viervijfzes:
 # https://github.com/add-ons/plugin.video.viervijfzes/blob/master/LICENSE
 
-""" Amazon Cognito implementation without external dependencies """
+# Amazon Cognito implementation without external dependencies
 # Based on https://github.com/retrospect-addon/plugin.video.retrospect/blob/master/channels/channel.be/vier/awsidp.py
 
-from __future__ import absolute_import, division
-
 import base64
 import binascii
 import datetime