diff --git a/bin/pandora_client b/bin/pandora_client
index d8c40b4..1a9535f 100755
--- a/bin/pandora_client
+++ b/bin/pandora_client
@@ -2,6 +2,7 @@
 # -*- coding: utf-8 -*-
 # vi:si:et:sw=4:sts=4:ts=4
 # GPL 2012
+from __future__ import print_function
 
 import os
 import sys
@@ -27,11 +28,11 @@ if __name__ == '__main__':
     (opts, args) = parser.parse_args()
 
     if opts.version:
-        print "%s %s" % (os.path.basename(sys.argv[0]), pandora_client.__version__)
+        print("%s %s" % (os.path.basename(sys.argv[0]), pandora_client.__version__))
         sys.exit(0)
     opts.config = os.path.expanduser(opts.config)
     if (args and args[0] not in ('config', 'client') and not os.path.exists(opts.config)):
-        print 'no configuration found, run "%s config" or specify one with -c' % sys.argv[0]
+        print('no configuration found, run "%s config" or specify one with -c' % sys.argv[0])
         sys.exit(1)
 
     if None in (opts.config, ):
diff --git a/pandora_client/__init__.py b/pandora_client/__init__.py
index e1f6edd..c8c5ef0 100755
--- a/pandora_client/__init__.py
+++ b/pandora_client/__init__.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 # vi:si:et:sw=4:sts=4:ts=4
 # GPL 2012-2016
-from __future__ import division, with_statement, print_function
+from __future__ import division, with_statement, print_function, absolute_import
 
 import getpass
 from glob import glob
@@ -16,12 +16,14 @@ import sys
 import tempfile
 import time
 import pkg_resources
-from urlparse import urlparse
+
+from six.moves.urllib.parse import urlparse
+from six import string_types
 
 import ox
 
-import extract
-import utils
+from . import extract
+from . import utils
 
 
 DEBUG = False
@@ -142,7 +144,7 @@ class Client(object):
     _configfile = None
 
     def __init__(self, config, offline=False):
-        if isinstance(config, basestring):
+        if isinstance(config, string_types):
             self._configfile = os.path.expanduser(config)
             with open(config) as f:
                 try:
@@ -235,7 +237,7 @@ class Client(object):
 
     def _conn(self):
         db_conn = self._config['cache']
-        if isinstance(db_conn, str):
+        if isinstance(db_conn, bytes):
             db_conn = db_conn.decode('utf-8')
         db_conn = os.path.expanduser(db_conn)
         if not os.path.exists(os.path.dirname(db_conn)):
@@ -277,7 +279,7 @@ class Client(object):
             prefixes = [prefix]
         else:
             prefixes = self.active_volumes().values()
-        prefixes = [p.decode('utf-8') if isinstance(prefix, str) else p for p in prefixes]
+        prefixes = [p.decode('utf-8') if isinstance(prefix, bytes) else p for p in prefixes]
         _info = self.info(oshash)
         for path in self.path(oshash):
             for prefix in prefixes:
@@ -385,7 +387,7 @@ class Client(object):
         modified = time.mktime(time.localtime())
         created = modified
 
-        if isinstance(path, str):
+        if isinstance(path, bytes):
             path = path.decode('utf-8')
 
         sql = u'SELECT atime, ctime, mtime, size, created, info FROM file WHERE deleted < 0 AND path=?'
@@ -507,7 +509,7 @@ class Client(object):
             path = os.path.normpath(path)
             if not path.endswith(os.sep):
                 path += os.sep
-            if isinstance(path, str):
+            if isinstance(path, bytes):
                 path = path.decode('utf-8')
             if os.path.exists(path):
                 volumes[name] = path
@@ -1029,7 +1031,7 @@ class API(ox.API):
         form.add_field('action', 'upload')
         form.add_field('id', str(oshash))
         fname = os.path.basename(filename)
-        if isinstance(fname, unicode):
+        if not isinstance(fname, bytes):
             fname = fname.encode('utf-8')
         form.add_file('file', fname, open(filename, 'rb'))
         r = self._json_request(self.url, form)
diff --git a/pandora_client/client.py b/pandora_client/client.py
index ef52eed..9c71205 100644
--- a/pandora_client/client.py
+++ b/pandora_client/client.py
@@ -1,6 +1,7 @@
 # encoding: utf-8
 # vi:si:et:sw=4:sts=4:ts=4
-from __future__ import print_function
+from __future__ import division, with_statement, print_function, absolute_import
+
 import os
 import json
 import subprocess
@@ -10,7 +11,7 @@ import sys
 
 import requests
 
-import extract
+from . import extract
 
 class DistributedClient:
 
diff --git a/pandora_client/extract.py b/pandora_client/extract.py
index 39ab4ff..a609d6b 100644
--- a/pandora_client/extract.py
+++ b/pandora_client/extract.py
@@ -2,7 +2,7 @@
 # -*- coding: utf-8 -*-
 # vi:si:et:sw=4:sts=4:ts=4
 # GPL 2010
-from __future__ import division, with_statement, print_function
+from __future__ import division, with_statement, print_function, absolute_import
 
 import os
 import subprocess
@@ -11,7 +11,7 @@ import shutil
 
 import ox
 
-from utils import AspectRatio, run_command, basedir
+from .utils import AspectRatio, run_command, basedir
 
 
 def command(program):
diff --git a/pandora_client/server.py b/pandora_client/server.py
index 510b1ff..08c7276 100644
--- a/pandora_client/server.py
+++ b/pandora_client/server.py
@@ -1,6 +1,6 @@
 # encoding: utf-8
 # vi:si:et:sw=4:sts=4:ts=4
-from __future__ import print_function
+from __future__ import division, with_statement, print_function, absolute_import
 
 import os
 import json
@@ -16,8 +16,8 @@ from twisted.web.static import File
 from twisted.web.server import Site
 from twisted.internet import reactor
 
-import extract
-from utils import hash_prefix
+from . import extract
+from .utils import hash_prefix
 
 class UploadThread(Thread):
     def __init__(self, server):
diff --git a/setup.py b/setup.py
index 9e84510..1ecfda1 100644
--- a/setup.py
+++ b/setup.py
@@ -51,6 +51,7 @@ setup(
     ],
     install_requires=[
         'ox >= 2.1.541,<3',
+        'six',
         'requests >= 1.1.0'
     ],
     keywords = [