diff --git a/.travis.yml b/.travis.yml
index c5c3405..fea5401 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,7 +18,7 @@ env:
 
 # command to install dependencies
 install:
-    - pip install six tox-travis
+    - pip install tox-travis
 
 # command to run tests
 script:
diff --git a/docs/extending.rst b/docs/extending.rst
index e6d4c75..cb31039 100644
--- a/docs/extending.rst
+++ b/docs/extending.rst
@@ -422,7 +422,7 @@ framework, we'll use those as an example...::
 
 
     class UserForm(ModelForm):
-        class Meta(object):
+        class Meta:
             model = User
             fields = ['username', 'first_name', 'last_name', 'email']
 
@@ -462,7 +462,7 @@ up your code into a validation method. An example of this might look like...::
 
 
     class UserForm(ModelForm):
-        class Meta(object):
+        class Meta:
             model = User
             fields = ['username', 'first_name', 'last_name', 'email']
 
diff --git a/docs/tutorial.rst b/docs/tutorial.rst
index 77bd56c..c99b9e5 100644
--- a/docs/tutorial.rst
+++ b/docs/tutorial.rst
@@ -141,7 +141,7 @@ a ``posts`` application, which has a model setup like so...::
         posted_on = models.DateTimeField(auto_now_add=True)
         updated_on = models.DateTimeField(auto_now=True)
 
-        class Meta(object):
+        class Meta:
             ordering = ['-posted_on', 'title']
 
         def __str__(self):
diff --git a/examples/django/posts/models.py b/examples/django/posts/models.py
index 3c0d609..97e8b44 100644
--- a/examples/django/posts/models.py
+++ b/examples/django/posts/models.py
@@ -10,7 +10,7 @@ class Post(models.Model):
     posted_on = models.DateTimeField(auto_now_add=True)
     updated_on = models.DateTimeField(auto_now=True)
 
-    class Meta(object):
+    class Meta:
         ordering = ['-posted_on', 'title']
 
     def __str__(self):
diff --git a/requirements.txt b/requirements.txt
index 3fd3941..e69de29 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +0,0 @@
-six>=1.4.0
diff --git a/restless/data.py b/restless/data.py
index f782aaf..56ba483 100644
--- a/restless/data.py
+++ b/restless/data.py
@@ -1,4 +1,4 @@
-class Data(object):
+class Data:
     def __init__(self, value, should_prepare=True, prepare_with=None):
         """
         A container object that carries meta information about the data.
diff --git a/restless/dj.py b/restless/dj.py
index 2d7a0fc..68626f5 100644
--- a/restless/dj.py
+++ b/restless/dj.py
@@ -1,5 +1,3 @@
-import six
-
 from django.conf import settings
 from django.conf.urls import url
 from django.core.exceptions import ObjectDoesNotExist
@@ -82,7 +80,7 @@ def build_response(self, data, status=OK):
     def build_error(self, err):
         # A bit nicer behavior surrounding things that don't exist.
         if isinstance(err, (ObjectDoesNotExist, Http404)):
-            err = NotFound(msg=six.text_type(err))
+            err = NotFound(msg=str(err))
 
         return super(DjangoResource, self).build_error(err)
 
diff --git a/restless/preparers.py b/restless/preparers.py
index 0515bc6..ad845ed 100644
--- a/restless/preparers.py
+++ b/restless/preparers.py
@@ -1,4 +1,4 @@
-class Preparer(object):
+class Preparer:
     """
     A plain preparation object which just passes through data.
 
diff --git a/restless/resources.py b/restless/resources.py
index 95a742a..d2dccff 100644
--- a/restless/resources.py
+++ b/restless/resources.py
@@ -20,7 +20,7 @@ def _wrapper(self, *args, **kwargs):
     return _wrapper
 
 
-class Resource(object):
+class Resource:
     """
     Defines a RESTful resource.
 
diff --git a/restless/serializers.py b/restless/serializers.py
index 43147d9..7237c18 100644
--- a/restless/serializers.py
+++ b/restless/serializers.py
@@ -2,7 +2,7 @@
 from .utils import json, MoreTypesJSONEncoder
 
 
-class Serializer(object):
+class Serializer:
     """
     A base serialization class.
 
diff --git a/restless/tnd.py b/restless/tnd.py
index 6c6618a..34ad68f 100644
--- a/restless/tnd.py
+++ b/restless/tnd.py
@@ -40,7 +40,7 @@ def _method(self, *args, **kwargs):
     yield self.resource_handler.handle(self.__resource_view_type__, *args, **kwargs)
 
 
-class _BridgeMixin(object):
+class _BridgeMixin:
     """
     This mixin would pass tornado parameters to restless,
     and helps to init a resource instance
diff --git a/setup.py b/setup.py
index 5660db7..27542fa 100644
--- a/setup.py
+++ b/setup.py
@@ -17,13 +17,10 @@
         'restless',
     ],
     requires=[
-        'six(>=1.4.0)',
     ],
     install_requires=[
-        'six>=1.4.0',
     ],
     tests_require=[
-        'mock',
         'tox',
     ],
     python_requires='!=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*',
diff --git a/tests/fakes.py b/tests/fakes.py
index 6c23329..79386e1 100644
--- a/tests/fakes.py
+++ b/tests/fakes.py
@@ -1,24 +1,20 @@
-import six
 
-
-class FakeHttpRequest(object):
+class FakeHttpRequest:
     def __init__(self, method='GET', body='', **kwargs):
         self.method = method.upper()
-        self.body = body
-        if six.PY3:
-            self.body = body.encode('utf-8')
+        self.body = body.encode('utf-8')
         if self.method == 'GET':
             self.GET = kwargs.get('get_request', {})
 
 
-class FakeHttpResponse(object):
+class FakeHttpResponse:
     def __init__(self, body, content_type='text/html'):
         self.body = body
         self.content_type = content_type
         self.status_code = 200
 
 
-class FakeModel(object):
-    def __init__(self, **kwargs):
+class FakeModel:
+    def __init_x_(self, **kwargs):
         for k, v in kwargs.items():
             setattr(self, k, v)
diff --git a/tests/test_dj.py b/tests/test_dj.py
index 520d712..440beb7 100644
--- a/tests/test_dj.py
+++ b/tests/test_dj.py
@@ -1,9 +1,5 @@
 import unittest
-
-try:
-    from http.client import responses
-except ImportError:
-    from httplib import responses
+from http.client import responses
 
 try:
     from django.conf import settings
diff --git a/tests/test_preparers.py b/tests/test_preparers.py
index e8b2a9a..5e2c5ba 100644
--- a/tests/test_preparers.py
+++ b/tests/test_preparers.py
@@ -4,7 +4,7 @@
                                 FieldsPreparer)
 
 
-class InstaObj(object):
+class InstaObj:
     def __init__(self, **kwargs):
         for k, v in kwargs.items():
             setattr(self, k, v)
diff --git a/tests/test_resources.py b/tests/test_resources.py
index 393331a..e317bf9 100644
--- a/tests/test_resources.py
+++ b/tests/test_resources.py
@@ -1,4 +1,3 @@
-import six
 import unittest
 
 from restless.exceptions import HttpError, NotFound, MethodNotImplemented
@@ -54,28 +53,16 @@ def test_request_method(self):
         self.assertEqual(self.res.request_method(), 'DELETE')
 
     def test_request_body(self):
-        if six.PY3:
-            self.assertEqual(self.res.request_body(), b'')
-        else:
-            self.assertEqual(self.res.request_body(), '')
+        self.assertEqual(self.res.request_body(), b'')
 
         self.res.request = FakeHttpRequest('POST', '{"hello": "world"}')
-        if six.PY3:
-            self.assertEqual(self.res.request_body(), b'{"hello": "world"}')
-        else:
-            self.assertEqual(self.res.request_body(), '{"hello": "world"}')
+        self.assertEqual(self.res.request_body(), b'{"hello": "world"}')
 
         self.res.request = FakeHttpRequest('PUT', '{"hello": "world"}')
-        if six.PY3:
-            self.assertEqual(self.res.request_body(), b'{"hello": "world"}')
-        else:
-            self.assertEqual(self.res.request_body(), '{"hello": "world"}')
+        self.assertEqual(self.res.request_body(), b'{"hello": "world"}')
 
         self.res.request = FakeHttpRequest('DELETE', '{}')
-        if six.PY3:
-            self.assertEqual(self.res.request_body(), b'{}')
-        else:
-            self.assertEqual(self.res.request_body(), '{}')
+        self.assertEqual(self.res.request_body(), b'{}')
 
     def test_build_response(self):
         resp = self.res.build_response('Hello, world!')
diff --git a/tests/test_tnd.py b/tests/test_tnd.py
index f45f481..49b7803 100644
--- a/tests/test_tnd.py
+++ b/tests/test_tnd.py
@@ -1,13 +1,12 @@
 import unittest
 import socket
-import six
 
 from restless.utils import json
 from restless.constants import UNAUTHORIZED
 
 
 def _newer_or_equal_(v):
-    for i in six.moves.xrange(min(len(v), len(version_info))):
+    for i in range(min(len(v), len(version_info))):
         expected, tnd = v[i], version_info[i]
         if tnd > expected:
             return True
@@ -19,7 +18,7 @@ def _newer_or_equal_(v):
 
 
 def _equal_(v):
-    for i in six.moves.xrange(min(len(v), len(version_info))):
+    for i in range(min(len(v), len(version_info))):
         if v[i] != version_info[i]:
             return False
     return True
diff --git a/tox.ini b/tox.ini
index ac05a3f..a5be201 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,7 +10,6 @@ basepython =
     py39: python3.9
     pypy: pypy
 deps =
-    six
     pytest
     pytest-cov
     WebOb>=1.3.1,<1.7