diff --git a/purge_static/cdn/cloudflare.py b/purge_static/cdn/cloudflare.py
index fac4e21..4f85170 100644
--- a/purge_static/cdn/cloudflare.py
+++ b/purge_static/cdn/cloudflare.py
@@ -2,7 +2,6 @@ import json
 import sys
 
 import requests
-import six
 
 from purge_static.utils import chunk
 
@@ -24,17 +23,17 @@ class CloudFlareCDN(object):
 
         self.api_token = credentials.get('api_token')
         if self.api_token:
-            if not isinstance(self.api_token, six.string_types):
+            if not isinstance(self.api_token, str):
                 sys.exit('In credentials file: key "api_token" should map to a string')
 
             self.email = self.api_key = None
         else:
             self.email = credentials.get('email')
-            if not isinstance(self.email, six.string_types):
+            if not isinstance(self.email, str):
                 sys.exit('In credentials file: key "email" should map to a string')
 
             self.api_key = credentials.get('api_key')
-            if not isinstance(self.api_key, six.string_types):
+            if not isinstance(self.api_key, str):
                 sys.exit('In credentials file: key "api_key" should map to a string')
 
         self.zone = args.zone
diff --git a/setup.py b/setup.py
index 64cf5ad..4793530 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@ setup(
     long_description_content_type='text/markdown',
     license='MIT',
     keywords='cloudflare cdn static cache purge',
-    install_requires=['requests', 'six'],
+    install_requires=['requests'],
     classifiers=[
         'Development Status :: 3 - Alpha',
         'Environment :: Console',
@@ -35,15 +35,11 @@ setup(
         'Operating System :: POSIX',
         'Operating System :: Microsoft :: Windows',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: 3.5',
-        'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
         'Topic :: Internet :: WWW/HTTP :: Site Management',
         'Topic :: System :: Systems Administration',
         'Topic :: Utilities',