diff --git a/rhodecode/apps/login/tests/test_login.py b/rhodecode/apps/login/tests/test_login.py
--- a/rhodecode/apps/login/tests/test_login.py
+++ b/rhodecode/apps/login/tests/test_login.py
@@ -18,7 +18,7 @@
 # RhodeCode Enterprise Edition, including its added features, Support services,
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 
-import urlparse
+import urllib.parse
 
 import mock
 import pytest
@@ -147,7 +147,7 @@ class TestLoginController(object):
                 h.route_path('repo_summary', repo_name=HG_REPO, _query=kwargs),
                 status=302)
 
-            response_query = urlparse.parse_qsl(response.location)
+            response_query = urllib.parse.urlparse.parse_qsl(response.location)
             assert 'branch=stable' in response_query[0][1]
 
     def test_login_form_with_get_args(self):
diff --git a/rhodecode/apps/login/views.py b/rhodecode/apps/login/views.py
--- a/rhodecode/apps/login/views.py
+++ b/rhodecode/apps/login/views.py
@@ -24,7 +24,7 @@ import datetime
 import formencode
 import formencode.htmlfill
 import logging
-import urlparse
+import urllib.parse
 import requests
 
 from pyramid.httpexceptions import HTTPFound
@@ -90,7 +90,7 @@ def store_user_in_session(session, usern
 
 def get_came_from(request):
     came_from = safe_str(request.GET.get('came_from', ''))
-    parsed = urlparse.urlparse(came_from)
+    parsed = urllib.parse.urlparse.urlparse(came_from)
     allowed_schemes = ['http', 'https']
     default_came_from = h.route_path('home')
     if parsed.scheme and parsed.scheme not in allowed_schemes:
diff --git a/rhodecode/apps/ssh_support/lib/backends/svn.py b/rhodecode/apps/ssh_support/lib/backends/svn.py
--- a/rhodecode/apps/ssh_support/lib/backends/svn.py
+++ b/rhodecode/apps/ssh_support/lib/backends/svn.py
@@ -25,7 +25,7 @@ import logging
 import signal
 import tempfile
 from subprocess import Popen, PIPE
-import urlparse
+import urllib.parse
 
 from .base import VcsServer
 
@@ -202,7 +202,7 @@ class SubversionTunnelWrapper(object):
         if not first_response:
             return self.fail("Repository name cannot be extracted")
 
-        url_parts = urlparse.urlparse(first_response['url'])
+        url_parts = urllib.parse.urlparse.urlparse(first_response['url'])
 
         self.server.repo_name = self._match_repo_name(url_parts.path.strip('/'))
 
diff --git a/rhodecode/lib/markup_renderer.py b/rhodecode/lib/markup_renderer.py
--- a/rhodecode/lib/markup_renderer.py
+++ b/rhodecode/lib/markup_renderer.py
@@ -27,7 +27,7 @@ import re
 import os
 import lxml
 import logging
-import urlparse
+import urllib.parse
 import bleach
 
 from mako.lookup import TemplateLookup
@@ -142,7 +142,7 @@ def relative_path(path, request_path, is
         # skip data, anchor, invalid links
         return path
 
-    is_absolute = bool(urlparse.urlparse(path).netloc)
+    is_absolute = bool(urllib.parse.urlparse.urlparse(path).netloc)
     if is_absolute:
         return path
 
diff --git a/rhodecode/lib/middleware/simplegit.py b/rhodecode/lib/middleware/simplegit.py
--- a/rhodecode/lib/middleware/simplegit.py
+++ b/rhodecode/lib/middleware/simplegit.py
@@ -25,7 +25,7 @@ It's implemented with basic auth functio
 import os
 import re
 import logging
-import urlparse
+import urllib.parse
 
 import rhodecode
 from rhodecode.lib import utils
@@ -123,7 +123,7 @@ class SimpleGit(simplevcs.SimpleVCS):
         path = environ['PATH_INFO']
 
         if path.endswith('/info/refs'):
-            query = urlparse.parse_qs(environ['QUERY_STRING'])
+            query = urllib.parse.urlparse.parse_qs(environ['QUERY_STRING'])
             service_cmd = query.get('service', [''])[0]
             return self._ACTION_MAPPING.get(service_cmd, 'pull')
 
diff --git a/rhodecode/lib/middleware/simplehg.py b/rhodecode/lib/middleware/simplehg.py
--- a/rhodecode/lib/middleware/simplehg.py
+++ b/rhodecode/lib/middleware/simplehg.py
@@ -24,7 +24,7 @@ SimpleHG middleware for handling mercuri
 """
 
 import logging
-import urlparse
+import urllib.parse
 import urllib.request, urllib.parse, urllib.error
 
 from rhodecode.lib import utils
@@ -135,7 +135,7 @@ class SimpleHg(simplevcs.SimpleVCS):
         :param environ:
         """
         default = 'push'
-        query = urlparse.parse_qs(environ['QUERY_STRING'],
+        query = urllib.parse.urlparse.parse_qs(environ['QUERY_STRING'],
                                   keep_blank_values=True)
 
         if 'cmd' in query:
diff --git a/rhodecode/lib/middleware/simplesvn.py b/rhodecode/lib/middleware/simplesvn.py
--- a/rhodecode/lib/middleware/simplesvn.py
+++ b/rhodecode/lib/middleware/simplesvn.py
@@ -21,7 +21,7 @@
 import base64
 import logging
 import urllib.request, urllib.parse, urllib.error
-import urlparse
+import urllib.parse
 
 import requests
 from pyramid.httpexceptions import HTTPNotAcceptable
@@ -123,7 +123,7 @@ class SimpleSvnApp(object):
 
     def _get_url(self, svn_http_server, path):
         svn_http_server_url = (svn_http_server or '').rstrip('/')
-        url_path = urlparse.urljoin(svn_http_server_url + '/', (path or '').lstrip('/'))
+        url_path = urllib.parse.urlparse.urljoin(svn_http_server_url + '/', (path or '').lstrip('/'))
         url_path = urllib.parse.quote(url_path, safe="/:=~+!$,;'")
         return url_path
 
diff --git a/rhodecode/lib/middleware/utils/scm_app_http.py b/rhodecode/lib/middleware/utils/scm_app_http.py
--- a/rhodecode/lib/middleware/utils/scm_app_http.py
+++ b/rhodecode/lib/middleware/utils/scm_app_http.py
@@ -24,7 +24,7 @@ Implementation of the scm_app interface 
 
 import base64
 import logging
-import urlparse
+import urllib.parse
 import wsgiref.util
 
 import msgpack
@@ -111,7 +111,7 @@ class VcsHttpProxy(object):
 
         # Preserve the query string
         url = self._url
-        url = urlparse.urljoin(url, self._repo_name)
+        url = urllib.parse.urlparse.urljoin(url, self._repo_name)
         if environ.get('QUERY_STRING'):
             url += '?' + environ['QUERY_STRING']
 
diff --git a/rhodecode/lib/middleware/vcs.py b/rhodecode/lib/middleware/vcs.py
--- a/rhodecode/lib/middleware/vcs.py
+++ b/rhodecode/lib/middleware/vcs.py
@@ -22,7 +22,7 @@ import gzip
 import shutil
 import logging
 import tempfile
-import urlparse
+import urllib.parse
 
 from webob.exc import HTTPNotFound
 
@@ -61,7 +61,7 @@ def is_hg(environ):
     http_accept = environ.get('HTTP_ACCEPT')
 
     if http_accept and http_accept.startswith('application/mercurial'):
-        query = urlparse.parse_qs(environ['QUERY_STRING'])
+        query = urllib.parse.urlparse.parse_qs(environ['QUERY_STRING'])
         if 'cmd' in query:
             is_hg_path = True
 
diff --git a/rhodecode/lib/vcs/client_http.py b/rhodecode/lib/vcs/client_http.py
--- a/rhodecode/lib/vcs/client_http.py
+++ b/rhodecode/lib/vcs/client_http.py
@@ -27,7 +27,7 @@ import logging
 import threading
 import time
 import urllib.request, urllib.error, urllib.parse
-import urlparse
+import urllib.parse
 import uuid
 import traceback
 
@@ -132,7 +132,7 @@ def _streaming_remote_call(url, payload,
 
 class ServiceConnection(object):
     def __init__(self, server_and_port, backend_endpoint, session_factory):
-        self.url = urlparse.urljoin('http://%s' % server_and_port, backend_endpoint)
+        self.url = urllib.parse.urlparse.urljoin('http://%s' % server_and_port, backend_endpoint)
         self._session_factory = session_factory
 
     def __getattr__(self, name):
@@ -154,8 +154,8 @@ class ServiceConnection(object):
 class RemoteVCSMaker(object):
 
     def __init__(self, server_and_port, backend_endpoint, backend_type, session_factory):
-        self.url = urlparse.urljoin('http://%s' % server_and_port, backend_endpoint)
-        self.stream_url = urlparse.urljoin('http://%s' % server_and_port, backend_endpoint+'/stream')
+        self.url = urllib.parse.urlparse.urljoin('http://%s' % server_and_port, backend_endpoint)
+        self.stream_url = urllib.parse.urlparse.urljoin('http://%s' % server_and_port, backend_endpoint+'/stream')
 
         self._session_factory = session_factory
         self.backend_type = backend_type
@@ -356,7 +356,7 @@ class VcsHttpProxy(object):
         retries = Retry(total=5, connect=None, read=None, redirect=None)
 
         adapter = requests.adapters.HTTPAdapter(max_retries=retries)
-        self.base_url = urlparse.urljoin('http://%s' % server_and_port, backend_endpoint)
+        self.base_url = urllib.parse.urlparse.urljoin('http://%s' % server_and_port, backend_endpoint)
         self.session = requests.Session()
         self.session.mount('http://', adapter)
 
diff --git a/rhodecode/model/validation_schema/widgets.py b/rhodecode/model/validation_schema/widgets.py
--- a/rhodecode/model/validation_schema/widgets.py
+++ b/rhodecode/model/validation_schema/widgets.py
@@ -21,7 +21,7 @@
 import logging
 
 import deform.widget
-from deform.widget import null, OptGroup, string_types
+from deform.widget import null, OptGroup
 
 log = logging.getLogger(__name__)
 
@@ -34,7 +34,7 @@ def _normalize_choices(values):
             result.append(OptGroup(item.label, *normalized_options))
         else:
             value, description, help_block = item
-            if not isinstance(value, string_types):
+            if not isinstance(value, str):
                 value = str(value)
             result.append((value, description, help_block))
     return result
diff --git a/rhodecode/tests/lib/middleware/test_simplegit.py b/rhodecode/tests/lib/middleware/test_simplegit.py
--- a/rhodecode/tests/lib/middleware/test_simplegit.py
+++ b/rhodecode/tests/lib/middleware/test_simplegit.py
@@ -19,7 +19,7 @@
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 
 import pytest
-import urlparse
+import urllib.parse
 import mock
 import simplejson as json
 
@@ -30,7 +30,7 @@ import rhodecode.lib.middleware.simplegi
 
 def get_environ(url, request_method):
     """Construct a minimum WSGI environ based on the URL."""
-    parsed_url = urlparse.urlparse(url)
+    parsed_url = urllib.parse.urlparse.urlparse(url)
     environ = {
         'PATH_INFO': parsed_url.path,
         'QUERY_STRING': parsed_url.query,
diff --git a/rhodecode/tests/lib/middleware/test_simplehg.py b/rhodecode/tests/lib/middleware/test_simplehg.py
--- a/rhodecode/tests/lib/middleware/test_simplehg.py
+++ b/rhodecode/tests/lib/middleware/test_simplehg.py
@@ -18,7 +18,7 @@
 # RhodeCode Enterprise Edition, including its added features, Support services,
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 
-import urlparse
+import urllib.parse
 
 import mock
 import pytest
@@ -31,7 +31,7 @@ import rhodecode.lib.middleware.simplehg
 
 def get_environ(url):
     """Construct a minimum WSGI environ based on the URL."""
-    parsed_url = urlparse.urlparse(url)
+    parsed_url = urllib.parse.urlparse.urlparse(url)
     environ = {
         'PATH_INFO': parsed_url.path,
         'QUERY_STRING': parsed_url.query,
diff --git a/rhodecode/tests/utils.py b/rhodecode/tests/utils.py
--- a/rhodecode/tests/utils.py
+++ b/rhodecode/tests/utils.py
@@ -27,11 +27,11 @@ import tempfile
 import urllib.request, urllib.error, urllib.parse
 from lxml.html import fromstring, tostring
 from lxml.cssselect import CSSSelector
-from urlparse import urlparse, parse_qsl
+import urllib.parse.urlparse
 from urllib.parse import unquote_plus
 import webob
 
-from webtest.app import TestResponse, TestApp, string_types
+from webtest.app import TestResponse, TestApp
 from webtest.compat import print_stderr
 
 import pytest
@@ -67,7 +67,7 @@ class CustomTestResponse(TestResponse):
         if 'no' in kw:
             no = kw['no']
             del kw['no']
-            if isinstance(no, string_types):
+            if isinstance(no, str):
                 no = [no]
         else:
             no = []
@@ -316,8 +316,8 @@ class _Url(object):
     """
 
     def __init__(self, url):
-        parts = urlparse(url)
-        _query = frozenset(parse_qsl(parts.query))
+        parts = urllib.parse.urlparse(url)
+        _query = frozenset(urllib.parse.parse_qsl(parts.query))
         _path = unquote_plus(parts.path)
         parts = parts._replace(query=_query, path=_path)
         self.parts = parts