diff --git a/alt_src/__init__.py b/alt_src/__init__.py
index 9e0a226..c8d6a1d 100644
--- a/alt_src/__init__.py
+++ b/alt_src/__init__.py
@@ -1 +1 @@
-from alt_src import *
+from .alt_src import *
diff --git a/alt_src/alt_src.py b/alt_src/alt_src.py
index eec28aa..37ff7a8 100644
--- a/alt_src/alt_src.py
+++ b/alt_src/alt_src.py
@@ -2,10 +2,12 @@
 '''
 Given an srpm and product, stage for alt-src release
 '''
+from __future__ import print_function
 
-import ConfigParser
+import six
+from six.moves import configparser
 import copy
-import cStringIO
+from six.moves import cStringIO as StringIO
 import datetime
 import errno
 import fcntl
@@ -22,8 +24,8 @@
 import sys
 import time
 import traceback
-from urllib import urlencode
-from urllib2 import Request, urlopen
+from six.moves.urllib.parse import urlencode
+from six.moves.urllib.request import Request, urlopen
 import yaml
 import simplejson as json
 
@@ -73,7 +75,7 @@
 def get_config(cfile, overrides):
     if not os.access(cfile, os.F_OK):
         die("Missing config file: %s" % cfile)
-    confp = ConfigParser.RawConfigParser()
+    confp = configparser.RawConfigParser()
     confp.read(cfile)
     if not confp.has_section('altsrc'):
         die("Configuration file missing [altsrc] section: %s" % cfile)
@@ -180,14 +182,14 @@ def __init__(self, options):
             self.rpms_or_module_dir = 'rpms'
 
         if not os.path.isfile(self.source_file):
-            raise StartupError, "No such file: %s" % self.source_file
+            raise StartupError("No such file: %s" % self.source_file)
 
     def run(self):
         raise NotImplementedError
 
     def add_error_logger(self):
         """Capture all error messages for use in later notifications"""
-        self.error_log = cStringIO.StringIO()
+        self.error_log = StringIO()
         handler = logging.StreamHandler(self.error_log)
         handler.setFormatter(logging.Formatter(self.options.config['log_format']))
         handler.setLevel(logging.ERROR)
@@ -195,14 +197,14 @@ def add_error_logger(self):
 
     def setup_logfile(self, logname):
         if not os.path.isdir(self.workdir):
-            raise SanityError, "Work dir does not exist: %s" % self.workdir
+            raise SanityError("Work dir does not exist: %s" % self.workdir)
         fname = fname_ = os.path.join(self.workdir, logname)
         ntimes = 0
         while os.path.exists(fname):
             # don't overwrite an old logfile
             ntimes += 1
             if ntimes > 1024:
-                raise SanityError, "Too many log backups"
+                raise SanityError("Too many log backups")
             fname = "%s.%d" % (fname_, ntimes)
         self.logfile = file(fname, 'w')
         handler = logging.StreamHandler(self.logfile)
@@ -250,7 +252,7 @@ def log_cmd(self, cmd, logfile=None, fatal=True, tries=None, **kwargs):
                 time.sleep(sleep_time)
         if ret:
             if fatal:
-                raise CommandError, "command failed: %r" % cmd
+                raise CommandError("command failed: %r" % cmd)
             #otherwise
             self.logger.warn("Command failed: %r", cmd)
         return ret
@@ -276,7 +278,7 @@ def get_output(self, cmd, fatal=True, **kwargs):
         if retval:
             self.logger.warn("Command failed: %r", cmd)
             if fatal:
-                raise CommandError, "command failed: %r" % cmd
+                raise CommandError("command failed: %r" % cmd)
         return output, retval
 
     def _get_koji_session_and_pathinfo(self):
@@ -289,9 +291,9 @@ def get_koji_srpm(self):
         session, pathinfo = self._get_koji_session_and_pathinfo()
         rpminfo = session.getRPM(self.options.source)
         if not rpminfo:
-            raise SanityError, "No such rpm: %s" % self.options.source
+            raise SanityError("No such rpm: %s" % self.options.source)
         if rpminfo['arch'] != 'src':
-            raise SanityError, "Not a source rpm: %s" % self.options.source
+            raise SanityError("Not a source rpm: %s" % self.options.source)
         binfo = session.getBuild(rpminfo['build_id'])
         bdir = pathinfo.build(binfo)
         relpath = pathinfo.rpm(rpminfo)
@@ -336,7 +338,7 @@ def read_srpm(self):
         headers = koji.get_rpm_header(self.source_file)
         self.headers = headers
         if headers[rpm.RPMTAG_SOURCEPACKAGE] != 1:
-            raise InputError, "%s is not a source package" % self.source_file
+            raise InputError("%s is not a source package" % self.source_file)
         data = koji.get_header_fields(headers, ['name', 'version', 'release', 'summary'])
         self.nvr = "%(name)s-%(version)s-%(release)s" % data
         self.package = data['name']
@@ -375,7 +377,7 @@ def check_package(self):
             self.logger.debug("Got blacklist: %r", blacklist)
             if blacklist and koji.util.multi_fnmatch(self.package, blacklist):
                 # raise FilterError, 'Blacklisted package: %s' % self.package
-                print 'Blacklisted package: %s, quitting' % self.package
+                print('Blacklisted package: %s, quitting' % self.package)
                 sys.exit(0)
 
     def git_push_url(self):
@@ -440,7 +442,7 @@ def find_spec(self, relative=False):
             if fname.endswith('.spec'):
                 return os.path.join(specdir, fname)
 
-        raise SanityError, 'No spec file in checkout: %s' % self.checkout
+        raise SanityError('No spec file in checkout: %s' % self.checkout)
 
     def duplicate_check(self):
         """Check to see if we're already on remote"""
@@ -485,7 +487,7 @@ def get_state(self):
 
     def set_state(self, state):
         if not self.workdir:
-            raise SanityError, "No workdir to set state for"
+            raise SanityError("No workdir to set state for")
         statefile = os.path.join(self.workdir, 'state')
         self.logger.debug('Writing state %s to file %s', state, statefile)
         fobj = open(statefile, 'w')
@@ -684,7 +686,7 @@ def make_workdir(self):
         self.workdir = dirname = self.get_workdir()
         koji.ensuredir(os.path.dirname(self.workdir))
         if os.path.islink(dirname):
-            raise SanityError, "%s is a symlink" % dirname
+            raise SanityError("%s is a symlink" % dirname)
         elif os.path.isdir(dirname):
             # TODO - more sanity checks
             self.set_in_progress()
@@ -707,7 +709,7 @@ def make_workdir(self):
 will overwrite.", dirname, state)
                     shutil.rmtree(dirname)
         elif os.path.exists(dirname):
-            raise SanityError, "%s exists and is not a directory" % dirname
+            raise SanityError("%s exists and is not a directory" % dirname)
         self.logger.info('Creating working directory: %s', dirname)
         koji.ensuredir(dirname)
         self.set_in_progress()
@@ -1019,7 +1021,7 @@ def copy_to_lookaside(self, path, digest):
             if st1.st_size != st2.st_size:
                 self.logger.error("Possibly corrupt lookaside entry: %s", lpath)
                 self.logger.error("Size: %s, but current matching source is %s", st1.st_size, st2.st_size)
-                raise SanityError, "Lookaside size mismatch"
+                raise SanityError("Lookaside size mismatch")
             # TODO - more sanity checks
             self.logger.info('Skipping source, already in digest: %s', path)
 
@@ -1030,7 +1032,7 @@ def debrand(self):
         if not self.options.config['debrand']:
             self.logger.warning("Debranding is disabled")
             return
-        confp = ConfigParser.RawConfigParser()
+        confp = configparser.RawConfigParser()
         for name in 'altsrc-global', self.package:
             cfile = os.path.join(self.options.config['rulesdir'], name + '.cfg')
             self.logger.debug('Looking for rules in %s', cfile)
@@ -1063,7 +1065,7 @@ def debrand(self):
         for key, rtype, section in rules:
             handler = 'rule_handler_%s' % rtype
             if not hasattr(self, handler):
-                raise ConfigError, "No handler for rule type %s" % rtype
+                raise ConfigError("No handler for rule type %s" % rtype)
             data = dict(confp.items(section))
             if 'enabled' in data:
                 enabled = data['enabled'].lower().strip()
@@ -1142,7 +1144,7 @@ def debrand(self):
         cmd = ['git', 'diff', '--cached', '--name-only']
         output, _ = self.get_output(cmd, cwd=self.checkout, stderr='keep', fatal=False)
         if not output:
-            raise SanityError, "Debranding rules made no changes"
+            raise SanityError("Debranding rules made no changes")
             # caller will clean up
 
         cmd = self.git_base_cmd()
@@ -1302,13 +1304,13 @@ def rule_handler_mmd(self, data):
             if isinstance(current_data, list):
                 gen = enumerate(current_data)
             elif isinstance(current_data, dict):
-                gen = current_data.items()
+                gen = list(current_data.items())
             if gen:
                 for key, val in gen:
                     if re.match(matching_path[0], str(key)):
                         stack.append((val, current_data, key, matching_path[1:]))
 
-            if isinstance(current_data, basestring):
+            if isinstance(current_data, six.string_types):
                 replaced = re.sub(matching_path[0],
                                   data['replace'],
                                   current_data)
@@ -1396,7 +1398,7 @@ def handle_add_patch(self, data):
                 # http://www.rpm.org/max-rpm/s1-rpm-inside-tags.html
                 if patchnum == pnum:
                     self.logger.error("Patch %s already present: %s", patchnum, line)
-                    raise SanityError, "Duplicate patch number"
+                    raise SanityError("Duplicate patch number")
             elif alt_re.search(line):
                 l_alt = lineno
         if patchnum == -1:
@@ -1435,7 +1437,7 @@ def handle_add_patch(self, data):
                 lines.insert(lnum + 1, entry)
                 self.logger.debug("Inserting spec line: %i: %s", lnum+1, entry)
             else:
-                raise SanityError, "Unable to apply patch %s" % patchname
+                raise SanityError("Unable to apply patch %s" % patchname)
         elif data.get('apply', 'y').lower() in ('y', 'yes', '1', 'true'):
             entry = "%%patch%d -p%d\n" % (patchnum, patchstrip)
             apply_re = re.compile(r'^\s*%patch\d+\s+-p\d')
@@ -1463,7 +1465,7 @@ def handle_add_patch(self, data):
                 lines.insert(lsetup + 1, entry)
                 self.logger.debug("Inserting spec line: %i: %s", lsetup+1, entry)
             else:
-                raise SanityError, "Unable to apply patch %s" % patchname
+                raise SanityError("Unable to apply patch %s" % patchname)
 
         # write it back out
         fobj = file(specfile, 'w')
@@ -1493,7 +1495,7 @@ def handle_rm_patch(self, data):
             patch_re = re.compile(r'^\s*[pP]atch(' + str(patchnum) + r'):\s+(\S+?)\s*$')
         else:
             self.logger.error('No patch specified for removal')
-            raise SanityError, 'Invalid rule'
+            raise SanityError('Invalid rule')
 
         specfile = self.find_spec()
         fobj = file(specfile, 'r')
@@ -1510,7 +1512,7 @@ def handle_rm_patch(self, data):
                 break
         else:
             self.logger.error("No match for pattern: %r", patch_re.pattern)
-            raise SanityError, "Could not find patch to remove"
+            raise SanityError("Could not find patch to remove")
         # remove the matching line
         if lineno:
             del lines[lineno]
@@ -1531,7 +1533,7 @@ def handle_rm_patch(self, data):
                 self.logger.warning('Patch %s appears to be applied by %%autosetup', patchname)
             else:
                 self.logger.error('No %%patch line for patch %s', patchname)
-                raise SanityError, "Unable to remove patch"
+                raise SanityError("Unable to remove patch")
 
         # write it back out
         fobj = file(specfile, 'w')
@@ -1549,7 +1551,7 @@ def rule_handler_source(self, data):
         #XXX support del?
         else:
             self.logger.error('Unknown source rule method: %s', method)
-            raise ConfigError, 'Invalid method in source rule'
+            raise ConfigError('Invalid method in source rule')
 
     def handle_add_source(self, data):
         """Add a source entry in spec file"""
@@ -1576,7 +1578,7 @@ def handle_add_source(self, data):
                 # http://www.rpm.org/max-rpm/s1-rpm-inside-tags.html
                 if sourcenum == snum:
                     self.logger.error("Source %s already present: %s", sourcenum, line)
-                    raise SanityError, "Duplicate source number"
+                    raise SanityError("Duplicate source number")
             elif name_re.search(line):
                 lname = lineno
         if sourcenum == -1:
@@ -1626,7 +1628,7 @@ def handle_replace_source(self, data):
                 break
         else:
             self.logger.error('Could not find source, no match for %r', source_re.pattern)
-            raise SanityError, 'No such source'
+            raise SanityError('No such source')
         # ... and replace it
         entry = "%s%s\n" % (head, sourcename)
         lines[lnum] = entry
@@ -1646,7 +1648,7 @@ def rule_handler_script(self, data):
         fname = data['script']
         script = os.path.join(self.options.config['rulesdir'], fname)
         if not os.path.isfile(script):
-            raise ConfigError, 'Script missing: %s' % script
+            raise ConfigError('Script missing: %s' % script)
 
         cmd = [script, self.checkout, self.find_spec()]
         self.log_cmd(cmd, cwd=self.checkout)
@@ -1698,9 +1700,9 @@ def check_workdir(self):
         self.checkout = os.path.join(self.workdir, "checkout")
         self.logger.info('Checking working directory: %s', dirname)
         if os.path.islink(dirname):
-            raise SanityError, "%s is a symlink" % dirname
+            raise SanityError("%s is a symlink" % dirname)
         if not os.path.isdir(dirname):
-            raise SanityError, "Not staged. No such directory: %s" % dirname
+            raise SanityError("Not staged. No such directory: %s" % dirname)
         state = self.get_state()
         if state == 'UNTAGGED':
             if self.options.config['push_tags']:
@@ -1713,7 +1715,7 @@ def check_workdir(self):
             self.logger.warn('Already pushed')
             return state
         if state != 'STAGED':
-            raise SanityError, "Staging incomplete"
+            raise SanityError("Staging incomplete")
         return state
 
     def add_changelog(self):
@@ -1749,7 +1751,7 @@ def add_changelog(self):
             return
         elif len(parts) == 2:
             # should not be possible
-            raise SanityError, 'Unable to split changelog from spec'
+            raise SanityError('Unable to split changelog from spec')
         outf = file(spec, 'w')
         for part in parts[:2]:
             outf.write(part)
@@ -1859,7 +1861,7 @@ def push_git(self, state):
                 cmd = ['git', 'diff', '--cached', '--name-only']
                 output, _ = self.get_output(cmd, cwd=self.checkout, stderr='keep', fatal=False)
                 if not output:
-                    raise SanityError, "Debranding commits resulted in no changes?"
+                    raise SanityError("Debranding commits resulted in no changes?")
                 #commit
                 cmd = self.git_base_cmd()
                 cmd.extend(['commit', '-m', 'debrand %s' % self.nvr])
@@ -1973,7 +1975,7 @@ def explode_srpm(srpm, destdir=None, logfile=None):
     if header[rpm.RPMTAG_SOURCEPACKAGE] != 1:
         # we checked this earlier, but since we're about to rpm -i it,
         # let's check again
-        raise SanityError, "%s is not a source package" % srpm
+        raise SanityError("%s is not a source package" % srpm)
     if destdir is None:
         destdir = os.getcwd()
     else:
@@ -1988,7 +1990,7 @@ def explode_srpm(srpm, destdir=None, logfile=None):
     proc = subprocess.Popen(cmd, **popts)
     ret = proc.wait()
     if ret:
-        raise CommandError, "command failed: %r" % cmd
+        raise CommandError("command failed: %r" % cmd)
 
 
 def wipe_git_dir(dirname):
@@ -2003,7 +2005,7 @@ def wipe_git_dir(dirname):
 
 
 def die(msg):
-    print msg
+    print(msg)
     sys.exit(1)
 
 
diff --git a/requirements.txt b/requirements.txt
index 0b715c0..bacc8b9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ rpm-py-installer
 requests
 PyYAML
 simplejson
+six
diff --git a/test-requirements.txt b/test-requirements.txt
index 3e979d7..4f89b8b 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,7 +1,6 @@
 mock
 PyHamcrest
 configparser
-six > 1.10
 
 # koji 1.20 doesn't include it
 # as dependency