--- a/setup.py
+++ b/setup.py
@@ -27,7 +27,6 @@
     url='https://github.com/invisibleroads/socketIO-client',
     install_requires=[
         'requests>=2.7.0',
-        'six',
         'websocket-client',
     ],
     tests_require=[
--- a/socketIO_client/parsers.py
+++ b/socketIO_client/parsers.py
@@ -1,7 +1,6 @@
 import json
-import six
 from collections import namedtuple
-from six.moves.urllib.parse import urlparse as parse_url
+from urllib.parse import urlparse as parse_url
 
 from .symmetries import decode_string, encode_string, get_byte, get_character
 
@@ -83,7 +82,7 @@
         args = json.loads(data)
     except ValueError:
         args = []
-    if isinstance(args, six.string_types):
+    if isinstance(args, str):
         args = [args]
     return SocketIOData(path=path, ack_id=ack_id, args=args)
 
--- a/socketIO_client/symmetries.py
+++ b/socketIO_client/symmetries.py
@@ -9,7 +9,8 @@
             pass
 
 
-from six import indexbytes
+import operator
+indexbytes = operator.getitem
 
 
 try:
--- a/socketIO_client/transports.py
+++ b/socketIO_client/transports.py
@@ -1,10 +1,9 @@
 import requests
-import six
 import ssl
 import threading
 import time
-from six.moves.urllib.parse import urlencode as format_query
-from six.moves.urllib.parse import urlparse as parse_url
+from urllib.parse import urlencode as format_query
+from urllib.parse import urlparse as parse_url
 from socket import error as SocketError
 try:
     from websocket import (
@@ -130,7 +129,7 @@
                     proxy_url_pack.username, proxy_url_pack.password)
         if http_session.verify:
             if http_session.cert:  # Specify certificate path on disk
-                if isinstance(http_session.cert, six.string_types):
+                if isinstance(http_session.cert, str):
                     kw['ca_certs'] = http_session.cert
                 else:
                     kw['ca_certs'] = http_session.cert[0]
@@ -152,7 +151,7 @@
             raise ConnectionError('recv disconnected (%s)' % e)
         except SocketError as e:
             raise ConnectionError('recv disconnected (%s)' % e)
-        if not isinstance(packet_text, six.binary_type):
+        if not isinstance(packet_text, bytes):
             packet_text = packet_text.encode('utf-8')
         engineIO_packet_type, engineIO_packet_data = parse_packet_text(
             packet_text)