diff --git a/cas.py b/cas.py
index ce56482..af54035 100644
--- a/cas.py
+++ b/cas.py
@@ -4,7 +4,7 @@
 
 import requests
 from lxml import etree
-from six.moves.urllib import parse as urllib_parse
+from urllib.parse import urljoin, urlencode
 
 logger = logging.getLogger(__name__)
 
@@ -103,8 +103,8 @@ def get_login_url(self):
             params.update({'renew': 'true'})
 
         params.update(self.extra_login_params)
-        url = urllib_parse.urljoin(self.server_url, 'login')
-        query = urllib_parse.urlencode(params)
+        url = urljoin(self.server_url, 'login')
+        query = urlencode(params)
         return ''.join([url, '?', query])
 
     def get_logout_url(self, redirect_url=None):
@@ -113,10 +113,10 @@ def get_logout_url(self, redirect_url=None):
         Returns:
             str: Logout URL
         """
-        url = urllib_parse.urljoin(self.server_url, 'logout')
+        url = urljoin(self.server_url, 'logout')
         if redirect_url:
             params = {self.logout_redirect_param_name: redirect_url}
-            query = urllib_parse.urlencode(params)
+            query = urlencode(params)
             return ''.join([url, '?', query])
         return url
 
@@ -127,8 +127,8 @@ def get_proxy_url(self, pgt):
             str: Proxy URL
         """
         params = {'pgt': pgt, 'targetService': self.service_url}
-        url = urllib_parse.urljoin(self.server_url, 'proxy')
-        query = urllib_parse.urlencode(params)
+        url = urljoin(self.server_url, 'proxy')
+        query = urlencode(params)
         return ''.join([url, '?', query])
 
     def get_proxy_ticket(self, pgt):
@@ -170,8 +170,7 @@ def verify_ticket(self, ticket):
         Returns username on success and None on failure.
         """
         params = [('ticket', ticket), ('service', self.service_url)]
-        url = (urllib_parse.urljoin(self.server_url, 'validate') + '?' +
-               urllib_parse.urlencode(params))
+        url = (urljoin(self.server_url, 'validate') + '?' + urlencode(params))
         page = self.session.get(
             url,
             stream=True,
@@ -211,7 +210,7 @@ def get_verification_response(self, ticket):
         }
         if self.proxy_callback:
             params.update({'pgtUrl': self.proxy_callback})
-        base_url = urllib_parse.urljoin(self.server_url, self.url_suffix)
+        base_url = urljoin(self.server_url, self.url_suffix)
         page = self.session.get(
             base_url,
             params=params,
@@ -377,9 +376,7 @@ def fetch_saml_validation(self, ticket):
             'content-type': 'text/xml; charset=utf-8',
         }
         params = {'TARGET': self.service_url}
-        saml_validate_url = urllib_parse.urljoin(
-            self.server_url, 'samlValidate',
-        )
+        saml_validate_url = urljoin(self.server_url, 'samlValidate',)
         return self.session.post(
             saml_validate_url,
             self.get_saml_assertion(ticket),
diff --git a/requirements.txt b/requirements.txt
index 73e854f..dbf5069 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,2 @@
 lxml>=3.4
-six>=1.0.0
 requests>=2.0.0
diff --git a/setup.py b/setup.py
index f0782fb..eaf3342 100755
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,6 @@
     ],
     python_requires=">=3.10",
     install_requires=[
-        'six>=1.10.0',
         'requests>=2.11.1',
         'lxml>=3.4',
     ],