diff --git a/cps.py b/cps.py
index 161b1655..ab9896ce 100755
--- a/cps.py
+++ b/cps.py
@@ -17,18 +17,13 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import absolute_import, division, print_function, unicode_literals
 import sys
 import os
 
 
 # Insert local directories into path
-if sys.version_info < (3, 0):
-    sys.path.append(os.path.dirname(os.path.abspath(__file__.decode('utf-8'))))
-    sys.path.append(os.path.join(os.path.dirname(os.path.abspath(__file__.decode('utf-8'))), 'vendor'))
-else:
-    sys.path.append(os.path.dirname(os.path.abspath(__file__)))
-    sys.path.append(os.path.join(os.path.dirname(os.path.abspath(__file__)), 'vendor'))
+sys.path.append(os.path.dirname(os.path.abspath(__file__)))
+sys.path.append(os.path.join(os.path.dirname(os.path.abspath(__file__)), 'vendor'))
 
 
 from cps import create_app
@@ -49,7 +44,7 @@ try:
     from cps.kobo import kobo, get_kobo_activated
     from cps.kobo_auth import kobo_auth
     kobo_available = get_kobo_activated()
-except (ImportError, AttributeError):   # Catch also error for not installed flask-wtf (missing csrf decorator)
+except (ImportError, AttributeError):   # Catch also error for not installed flask-WTF (missing csrf decorator)
     kobo_available = False
 
 try:
diff --git a/cps/__init__.py b/cps/__init__.py
index f1143d9d..f38ce0d2 100644
--- a/cps/__init__.py
+++ b/cps/__init__.py
@@ -20,7 +20,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import sys
 import os
 import mimetypes
@@ -118,16 +117,11 @@ def create_app():
         print('*** "lxml" is needed for calibre-web to run. Please install it using pip: "pip install lxml" ***')
         sys.exit(6)
     if not wtf_present:
-        log.info('*** "flask-wtf" is needed for calibre-web to run. Please install it using pip: "pip install flask-wtf" ***')
-        print('*** "flask-wtf" is needed for calibre-web to run. Please install it using pip: "pip install flask-wtf" ***')
-        sys.exit(7)
+        log.info('*** "flask-WTF" is needed for calibre-web to run. Please install it using pip: "pip install flask-WTF" ***')
+        print('*** "flask-WTF" is needed for calibre-web to run. Please install it using pip: "pip install flask-WTF" ***')
+        # sys.exit(7)
 
     app.wsgi_app = ReverseProxied(app.wsgi_app)
-    # For python2 convert path to unicode
-    if sys.version_info < (3, 0):
-        app.static_folder = app.static_folder.decode('utf-8')
-        app.root_path = app.root_path.decode('utf-8')
-        app.instance_path = app.instance_path.decode('utf-8')
 
     if os.environ.get('FLASK_DEBUG'):
         cache_buster.init_cache_busting(app)
diff --git a/cps/about.py b/cps/about.py
index 31a16552..f3c8b95f 100644
--- a/cps/about.py
+++ b/cps/about.py
@@ -20,7 +20,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import sys
 import platform
 import sqlite3
diff --git a/cps/admin.py b/cps/admin.py
index 2a65e53a..6d6c3ba2 100644
--- a/cps/admin.py
+++ b/cps/admin.py
@@ -20,7 +20,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 import re
 import base64
diff --git a/cps/cache_buster.py b/cps/cache_buster.py
index 8c521fe1..9619d605 100644
--- a/cps/cache_buster.py
+++ b/cps/cache_buster.py
@@ -19,7 +19,6 @@
 # Inspired by https://github.com/ChrisTM/Flask-CacheBust
 # Uses query strings so CSS font files are found without having to resort to absolute URLs
 
-from __future__ import division, print_function, unicode_literals
 import os
 import hashlib
 
diff --git a/cps/cli.py b/cps/cli.py
index 3bb08c1f..3685e8e2 100644
--- a/cps/cli.py
+++ b/cps/cli.py
@@ -16,7 +16,6 @@
 #   You should have received a copy of the GNU General Public License
 #   along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import sys
 import os
 import argparse
@@ -48,19 +47,6 @@ parser.add_argument('-s', metavar='user:pass', help='Sets specific username to n
 parser.add_argument('-f', action='store_true', help='Flag is depreciated and will be removed in next version')
 args = parser.parse_args()
 
-if sys.version_info < (3, 0):
-    if args.p:
-        args.p = args.p.decode('utf-8')
-    if args.g:
-        args.g = args.g.decode('utf-8')
-    if args.k:
-        args.k = args.k.decode('utf-8')
-    if args.c:
-        args.c = args.c.decode('utf-8')
-    if args.s:
-        args.s = args.s.decode('utf-8')
-
-
 settingspath = args.p or os.path.join(_CONFIG_DIR, "app.db")
 gdpath       = args.g or os.path.join(_CONFIG_DIR, "gdrive.db")
 
diff --git a/cps/comic.py b/cps/comic.py
index 462c11f0..b094c60f 100644
--- a/cps/comic.py
+++ b/cps/comic.py
@@ -16,7 +16,6 @@
 #   You should have received a copy of the GNU General Public License
 #   along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 
 from . import logger, isoLanguages
diff --git a/cps/config_sql.py b/cps/config_sql.py
index 88107f9b..232de145 100644
--- a/cps/config_sql.py
+++ b/cps/config_sql.py
@@ -16,8 +16,6 @@
 #   You should have received a copy of the GNU General Public License
 #   along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-
-from __future__ import division, print_function, unicode_literals
 import os
 import sys
 import json
@@ -361,10 +359,6 @@ def _migrate_table(session, orm_class):
                 session.query(column).first()
             except OperationalError as err:
                 log.debug("%s: %s", column_name, err.args[0])
-                if column.default is not None:
-                    if sys.version_info < (3, 0):
-                        if isinstance(column.default.arg, unicode):
-                            column.default.arg = column.default.arg.encode('utf-8')
                 if column.default is None:
                     column_default = ""
                 else:
diff --git a/cps/constants.py b/cps/constants.py
index bfdee6da..367bc29d 100644
--- a/cps/constants.py
+++ b/cps/constants.py
@@ -16,7 +16,6 @@
 #   You should have received a copy of the GNU General Public License
 #   along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import sys
 import os
 from collections import namedtuple
@@ -31,12 +30,7 @@ HOME_CONFIG = os.path.isfile(os.path.join(os.path.dirname(os.path.abspath(__file
 UPDATER_AVAILABLE = True
 
 # Base dir is parent of current file, necessary if called from different folder
-if sys.version_info < (3, 0):
-    BASE_DIR            = os.path.abspath(os.path.join(
-        os.path.dirname(os.path.abspath(__file__)),os.pardir)).decode('utf-8')
-else:
-    BASE_DIR            = os.path.abspath(os.path.join(
-        os.path.dirname(os.path.abspath(__file__)),os.pardir))
+BASE_DIR            = os.path.abspath(os.path.join(os.path.dirname(os.path.abspath(__file__)),os.pardir))
 STATIC_DIR          = os.path.join(BASE_DIR, 'cps', 'static')
 TEMPLATES_DIR       = os.path.join(BASE_DIR, 'cps', 'templates')
 TRANSLATIONS_DIR    = os.path.join(BASE_DIR, 'cps', 'translations')
diff --git a/cps/converter.py b/cps/converter.py
index 6b0f22e4..fcbabbfc 100644
--- a/cps/converter.py
+++ b/cps/converter.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 import re
 from flask_babel import gettext as _
diff --git a/cps/db.py b/cps/db.py
index cfb2ed7c..ab4f5bf5 100644
--- a/cps/db.py
+++ b/cps/db.py
@@ -17,7 +17,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import sys
 import os
 import re
@@ -387,8 +386,6 @@ class Custom_Columns(Base):
 
     def get_display_dict(self):
         display_dict = ast.literal_eval(self.display)
-        if sys.version_info < (3, 0):
-            display_dict['enum_values'] = [x.decode('unicode_escape') for x in display_dict['enum_values']]
         return display_dict
 
 
diff --git a/cps/editbooks.py b/cps/editbooks.py
index ce06fbf4..063eba2a 100644
--- a/cps/editbooks.py
+++ b/cps/editbooks.py
@@ -20,7 +20,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 from datetime import datetime
 import json
diff --git a/cps/epub.py b/cps/epub.py
index 998dbfa6..cbbdcbbd 100644
--- a/cps/epub.py
+++ b/cps/epub.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 import zipfile
 from lxml import etree
diff --git a/cps/fb2.py b/cps/fb2.py
index af4a29a7..21586736 100644
--- a/cps/fb2.py
+++ b/cps/fb2.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 from lxml import etree
 
 from .constants import BookMeta
diff --git a/cps/gdrive.py b/cps/gdrive.py
index c0764015..e2d8f166 100644
--- a/cps/gdrive.py
+++ b/cps/gdrive.py
@@ -20,7 +20,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 import sys
 import hashlib
@@ -137,10 +136,7 @@ def on_received_watch_confirmation():
         response = gdriveutils.getChangeById(gdriveutils.Gdrive.Instance().drive, j['id'])
         log.debug('%r', response)
         if response:
-            if sys.version_info < (3, 0):
-                dbpath = os.path.join(config.config_calibre_dir, "metadata.db")
-            else:
-                dbpath = os.path.join(config.config_calibre_dir, "metadata.db").encode()
+            dbpath = os.path.join(config.config_calibre_dir, "metadata.db").encode()
             if not response['deleted'] and response['file']['title'] == 'metadata.db' \
                 and response['file']['md5Checksum'] != hashlib.md5(dbpath):  # nosec
                 tmp_dir = os.path.join(tempfile.gettempdir(), 'calibre_web')
diff --git a/cps/gdriveutils.py b/cps/gdriveutils.py
index c63b0393..d3277814 100644
--- a/cps/gdriveutils.py
+++ b/cps/gdriveutils.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 import json
 import shutil
diff --git a/cps/helper.py b/cps/helper.py
index f7b72a8d..df7019e6 100644
--- a/cps/helper.py
+++ b/cps/helper.py
@@ -17,7 +17,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import sys
 import os
 import io
@@ -490,10 +489,7 @@ def reset_password(user_id):
 def generate_random_password():
     s = "abcdefghijklmnopqrstuvwxyz01234567890ABCDEFGHIJKLMNOPQRSTUVWXYZ!@#$%&*()?"
     passlen = 8
-    if sys.version_info < (3, 0):
-        return "".join(s[ord(c) % len(s)] for c in os.urandom(passlen))
-    else:
-        return "".join(s[c % len(s)] for c in os.urandom(passlen))
+    return "".join(s[c % len(s)] for c in os.urandom(passlen))
 
 
 def uniq(inpt):
@@ -707,8 +703,6 @@ def check_unrar(unrarLocation):
         return _('Unrar binary file not found')
 
     try:
-        if sys.version_info < (3, 0):
-            unrarLocation = unrarLocation.encode(sys.getfilesystemencoding())
         unrarLocation = [unrarLocation]
         value = process_wait(unrarLocation, pattern='UNRAR (.*) freeware')
         if value:
diff --git a/cps/isoLanguages.py b/cps/isoLanguages.py
index 35d9f0a7..6c66a583 100644
--- a/cps/isoLanguages.py
+++ b/cps/isoLanguages.py
@@ -16,8 +16,6 @@
 #   You should have received a copy of the GNU General Public License
 #   along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
-
 from .iso_language_names import LANGUAGE_NAMES as _LANGUAGE_NAMES
 
 
diff --git a/cps/iso_language_names.py b/cps/iso_language_names.py
index d07158a0..9966ecd9 100644
--- a/cps/iso_language_names.py
+++ b/cps/iso_language_names.py
@@ -6,8 +6,6 @@
 
 # pylint: disable=too-many-lines,bad-continuation
 
-from __future__ import unicode_literals
-
 # This file is autogenerated, do NOT add, change, or delete ANY string
 # If you need help or assistance for adding a new language, please contact the project team  
 
@@ -7855,4 +7853,4 @@ LANGUAGE_NAMES = {
         "zxx": "No linguistic content",
         "zza": "Zaza"
     }
-}
\ No newline at end of file
+}
diff --git a/cps/jinjia.py b/cps/jinjia.py
index 554bc791..06e99141 100644
--- a/cps/jinjia.py
+++ b/cps/jinjia.py
@@ -22,7 +22,6 @@
 
 # custom jinja filters
 
-from __future__ import division, print_function, unicode_literals
 import datetime
 import mimetypes
 from uuid import uuid4
diff --git a/cps/kobo.py b/cps/kobo.py
index ba9a8d1f..5ce2b640 100644
--- a/cps/kobo.py
+++ b/cps/kobo.py
@@ -492,10 +492,7 @@ def get_metadata(book):
     metadata.update(get_author(book))
 
     if get_series(book):
-        if sys.version_info < (3, 0):
-            name = get_series(book).encode("utf-8")
-        else:
-            name = get_series(book)
+        name = get_series(book)
         metadata["Series"] = {
             "Name": get_series(book),
             "Number": get_seriesindex(book),        # ToDo Check int() ?
diff --git a/cps/logger.py b/cps/logger.py
index e2747f53..5847188b 100644
--- a/cps/logger.py
+++ b/cps/logger.py
@@ -16,7 +16,6 @@
 #   You should have received a copy of the GNU General Public License
 #   along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 import sys
 import inspect
diff --git a/cps/oauth.py b/cps/oauth.py
index a8995180..f8e5c1fd 100644
--- a/cps/oauth.py
+++ b/cps/oauth.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>
 
-from __future__ import division, print_function, unicode_literals
 from flask import session
 
 try:
diff --git a/cps/oauth_bb.py b/cps/oauth_bb.py
index c8cc2e3e..d9efd41e 100644
--- a/cps/oauth_bb.py
+++ b/cps/oauth_bb.py
@@ -20,7 +20,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>
 
-from __future__ import division, print_function, unicode_literals
 import json
 from functools import wraps
 
diff --git a/cps/opds.py b/cps/opds.py
index 2a615607..92c51d1b 100644
--- a/cps/opds.py
+++ b/cps/opds.py
@@ -20,7 +20,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import sys
 import datetime
 from functools import wraps
@@ -537,11 +536,10 @@ def feed_search(term):
 
 
 def check_auth(username, password):
-    if sys.version_info.major == 3:
-        try:
-            username = username.encode('windows-1252')
-        except UnicodeEncodeError:
-            username = username.encode('utf-8')
+    try:
+        username = username.encode('windows-1252')
+    except UnicodeEncodeError:
+        username = username.encode('utf-8')
     user = ub.session.query(ub.User).filter(func.lower(ub.User.name) ==
                                             username.decode('utf-8').lower()).first()
     if bool(user and check_password_hash(str(user.password), password)):
diff --git a/cps/pagination.py b/cps/pagination.py
index c29717c2..7a9bfb70 100644
--- a/cps/pagination.py
+++ b/cps/pagination.py
@@ -20,7 +20,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 from math import ceil
 
 
diff --git a/cps/redirect.py b/cps/redirect.py
index 593afd0c..d491b353 100644
--- a/cps/redirect.py
+++ b/cps/redirect.py
@@ -27,7 +27,6 @@
 
 # http://flask.pocoo.org/snippets/62/
 
-from __future__ import division, print_function, unicode_literals
 try:
     from urllib.parse import urlparse, urljoin
 except ImportError:
diff --git a/cps/reverseproxy.py b/cps/reverseproxy.py
index 3bcbd3b7..4acb8e45 100644
--- a/cps/reverseproxy.py
+++ b/cps/reverseproxy.py
@@ -36,8 +36,6 @@
 #
 # Inspired by http://flask.pocoo.org/snippets/35/
 
-from __future__ import division, print_function, unicode_literals
-
 
 class ReverseProxied(object):
     """Wrap the application in this middleware and configure the
diff --git a/cps/search_metadata.py b/cps/search_metadata.py
index 72e77cdd..e837fe21 100644
--- a/cps/search_metadata.py
+++ b/cps/search_metadata.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 import json
 import importlib
diff --git a/cps/server.py b/cps/server.py
index 9b79f77d..e261c50a 100644
--- a/cps/server.py
+++ b/cps/server.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import sys
 import os
 import errno
diff --git a/cps/services/SyncToken.py b/cps/services/SyncToken.py
index 86165f71..692aaa24 100644
--- a/cps/services/SyncToken.py
+++ b/cps/services/SyncToken.py
@@ -35,10 +35,7 @@ log = logger.create()
 
 
 def b64encode_json(json_data):
-    if sys.version_info < (3, 0):
-        return b64encode(json.dumps(json_data))
-    else:
-        return b64encode(json.dumps(json_data).encode())
+    return b64encode(json.dumps(json_data).encode())
 
 
 # Python3 has a timestamp() method we could be calling, however it's not avaiable in python2.
diff --git a/cps/services/__init__.py b/cps/services/__init__.py
index e6e5954c..32a9d485 100644
--- a/cps/services/__init__.py
+++ b/cps/services/__init__.py
@@ -16,8 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
-
 from .. import logger
 
 
diff --git a/cps/services/gmail.py b/cps/services/gmail.py
index baada1f8..ff36b308 100644
--- a/cps/services/gmail.py
+++ b/cps/services/gmail.py
@@ -1,4 +1,21 @@
-from __future__ import print_function
+# -*- coding: utf-8 -*-
+
+#  This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
+#    Copyright (C) 2021 OzzieIsaacs
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program. If not, see <http://www.gnu.org/licenses/>.
+
 import os.path
 from google_auth_oauthlib.flow import InstalledAppFlow
 from google.auth.transport.requests import Request
diff --git a/cps/services/goodreads_support.py b/cps/services/goodreads_support.py
index 9312bc0f..74e6eba9 100644
--- a/cps/services/goodreads_support.py
+++ b/cps/services/goodreads_support.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import time
 from functools import reduce
 
diff --git a/cps/services/simpleldap.py b/cps/services/simpleldap.py
index 4125bdab..1ca7e5bf 100644
--- a/cps/services/simpleldap.py
+++ b/cps/services/simpleldap.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import base64
 
 from flask_simpleldap import LDAP, LDAPException
diff --git a/cps/services/worker.py b/cps/services/worker.py
index 238c8dbf..5952c705 100644
--- a/cps/services/worker.py
+++ b/cps/services/worker.py
@@ -1,5 +1,21 @@
+# -*- coding: utf-8 -*-
+
+#  This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
+#    Copyright (C) 2020 pwr
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import threading
 import abc
 import uuid
diff --git a/cps/shelf.py b/cps/shelf.py
index d232e850..09fe8dd4 100644
--- a/cps/shelf.py
+++ b/cps/shelf.py
@@ -20,8 +20,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
-
 import sys
 from datetime import datetime
 
diff --git a/cps/subproc_wrapper.py b/cps/subproc_wrapper.py
index 3cc4a070..187b2cb2 100644
--- a/cps/subproc_wrapper.py
+++ b/cps/subproc_wrapper.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import sys
 import os
 import subprocess
@@ -33,13 +32,8 @@ def process_open(command, quotes=(), env=None, sout=subprocess.PIPE, serr=subpro
             if key in quotes:
                 command[key] = '"' + element + '"'
         exc_command = " ".join(command)
-        if sys.version_info < (3, 0):
-            exc_command = exc_command.encode(sys.getfilesystemencoding())
     else:
-        if sys.version_info < (3, 0):
-            exc_command = [x.encode(sys.getfilesystemencoding()) for x in command]
-        else:
-            exc_command = [x for x in command]
+        exc_command = [x for x in command]
 
     return subprocess.Popen(exc_command, shell=False, stdout=sout, stderr=serr, universal_newlines=newlines, env=env) # nosec
 
diff --git a/cps/tasks/convert.py b/cps/tasks/convert.py
index 56cc7076..08fb1644 100644
--- a/cps/tasks/convert.py
+++ b/cps/tasks/convert.py
@@ -1,4 +1,21 @@
-from __future__ import division, print_function, unicode_literals
+# -*- coding: utf-8 -*-
+
+#  This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
+#    Copyright (C) 2020 pwr
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program. If not, see <http://www.gnu.org/licenses/>.
+
 import sys
 import os
 import re
@@ -161,8 +178,6 @@ class TaskConvert(CalibreTask):
         while True:
             nextline = p.stdout.readlines()
             nextline = [x.strip('\n') for x in nextline if x != '\n']
-            if sys.version_info < (3, 0):
-                nextline = [x.decode('utf-8') for x in nextline]
             for line in nextline:
                 log.debug(line)
             if p.poll() is not None:
@@ -207,10 +222,6 @@ class TaskConvert(CalibreTask):
 
         while p.poll() is None:
             nextline = p.stdout.readline()
-            if os.name == 'nt' and sys.version_info < (3, 0):
-                nextline = nextline.decode('windows-1252')
-            elif os.name == 'posix' and sys.version_info < (3, 0):
-                nextline = nextline.decode('utf-8')
             log.debug(nextline.strip('\r\n'))
             # parse progress string from calibre-converter
             progress = re.search(r"(\d+)%\s.*", nextline)
@@ -224,8 +235,6 @@ class TaskConvert(CalibreTask):
         calibre_traceback = p.stderr.readlines()
         error_message = ""
         for ele in calibre_traceback:
-            if sys.version_info < (3, 0):
-                ele = ele.decode('utf-8')
             log.debug(ele.strip('\n'))
             if not ele.startswith('Traceback') and not ele.startswith('  File'):
                 error_message = _("Calibre failed with error: %(error)s", error=ele.strip('\n'))
diff --git a/cps/tasks/mail.py b/cps/tasks/mail.py
index 292114d5..2e95ee98 100644
--- a/cps/tasks/mail.py
+++ b/cps/tasks/mail.py
@@ -1,11 +1,27 @@
-from __future__ import division, print_function, unicode_literals
+# -*- coding: utf-8 -*-
+
+#  This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
+#    Copyright (C) 2020 pwr
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program. If not, see <http://www.gnu.org/licenses/>.
+
 import sys
 import os
 import smtplib
 import threading
 import socket
 import mimetypes
-import base64
 
 try:
     from StringIO import StringIO
@@ -162,17 +178,11 @@ class TaskEmail(CalibreTask):
             log.debug_or_exception(ex)
             self._handleError(u'Error sending e-mail: {}'.format(ex))
 
-
     def send_standard_email(self, msg):
         use_ssl = int(self.settings.get('mail_use_ssl', 0))
         timeout = 600  # set timeout to 5mins
 
-        # redirect output to logfile on python2 on python3 debugoutput is caught with overwritten
-        # _print_debug function
-        if sys.version_info < (3, 0):
-            org_smtpstderr = smtplib.stderr
-            smtplib.stderr = logger.StderrLogger('worker.smtp')
-
+        # on python3 debugoutput is caught with overwritten _print_debug function
         log.debug("Start sending e-mail")
         if use_ssl == 2:
             self.asyncSMTP = EmailSSL(self.settings["mail_server"], self.settings["mail_port"],
@@ -198,9 +208,6 @@ class TaskEmail(CalibreTask):
         self._handleSuccess()
         log.debug("E-mail send successfully")
 
-        if sys.version_info < (3, 0):
-            smtplib.stderr = org_smtpstderr
-
     def send_gmail_email(self, message):
         return gmail.send_messsage(self.settings.get('mail_gmail_token', None), message)
 
@@ -218,7 +225,6 @@ class TaskEmail(CalibreTask):
             self.asyncSMTP = None
             self._progress = x
 
-
     @classmethod
     def _get_attachment(cls, bookpath, filename):
         """Get file as MIMEBase message"""
diff --git a/cps/tasks/upload.py b/cps/tasks/upload.py
index d7ef34c2..6a341cdd 100644
--- a/cps/tasks/upload.py
+++ b/cps/tasks/upload.py
@@ -1,4 +1,20 @@
-from __future__ import division, print_function, unicode_literals
+# -*- coding: utf-8 -*-
+
+#  This file is part of the Calibre-Web (https://github.com/janeczku/calibre-web)
+#    Copyright (C) 2020 pwr
+#
+#  This program is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 from datetime import datetime
 from cps.services.worker import CalibreTask, STAT_FINISH_SUCCESS
diff --git a/cps/ub.py b/cps/ub.py
index df1f0bc8..fe9d476a 100644
--- a/cps/ub.py
+++ b/cps/ub.py
@@ -17,7 +17,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 import sys
 import datetime
diff --git a/cps/updater.py b/cps/updater.py
index 63ea23bf..9090263f 100644
--- a/cps/updater.py
+++ b/cps/updater.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import sys
 import os
 import datetime
diff --git a/cps/uploader.py b/cps/uploader.py
index 0d59fd01..92a73381 100644
--- a/cps/uploader.py
+++ b/cps/uploader.py
@@ -16,7 +16,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 import hashlib
 from tempfile import gettempdir
diff --git a/cps/web.py b/cps/web.py
index db0be841..fb01b6e5 100644
--- a/cps/web.py
+++ b/cps/web.py
@@ -20,7 +20,6 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-from __future__ import division, print_function, unicode_literals
 import os
 from datetime import datetime
 import json
@@ -30,7 +29,6 @@ import copy
 
 from babel.dates import format_date
 from babel import Locale as LC
-from babel.core import UnknownLocaleError
 from flask import Blueprint, jsonify
 from flask import request, redirect, send_from_directory, make_response, flash, abort, url_for
 from flask import session as flask_session
@@ -212,7 +210,7 @@ def toggle_archived(book_id):
 @web.route("/ajax/view", methods=["POST"])
 @login_required_if_no_ano
 def update_view():
-    to_save = request.get_json()
+    to_save = request.form.to_dict() # request.get_json()
     try:
         for element in to_save:
             for param in to_save[element]:
@@ -261,10 +259,7 @@ def get_comic_book(book_id, book_format, page):
                     log.error('unsupported comic format')
                     return "", 204
 
-                if sys.version_info.major >= 3:
-                    b64 = codecs.encode(extract(page), 'base64').decode()
-                else:
-                    b64 = extract(page).encode('base64')
+                b64 = codecs.encode(extract(page), 'base64').decode()
                 ext = names[page].rpartition('.')[-1]
                 if ext not in ('png', 'gif', 'jpg', 'jpeg', 'webp'):
                     ext = 'png'
@@ -274,7 +269,6 @@ def get_comic_book(book_id, book_format, page):
         return "", 204
 '''
 
-
 # ################################### Typeahead ##################################################################