diff --git a/warden3/warden_server/warden_server.py b/warden3/warden_server/warden_server.py
index 8a7ad6b0e4ef6dbcc12dffc2d59f23b797db16f6..06639060713e0c558cfab683a3295e4e95c7bcac 100644
--- a/warden3/warden_server/warden_server.py
+++ b/warden3/warden_server/warden_server.py
@@ -1,4 +1,4 @@
-#!/usr/bin/python
+#!/usr/bin/python3
 # -*- coding: utf-8 -*-
 #
 # Copyright (C) 2011-2015 Cesnet z.s.p.o
@@ -8,21 +8,26 @@ from __future__ import print_function
 
 import sys
 import os
+from os import path
 import logging
 import logging.handlers
-import ConfigParser
-from traceback import format_tb
-import M2Crypto.X509
 import json
-import MySQLdb as my
-import MySQLdb.cursors as mycursors
 import re
 import email.utils
+from traceback import format_tb
 from collections import namedtuple
 from time import sleep
-from urlparse import parse_qs
-from os import path
 from random import randint
+import M2Crypto.X509
+import MySQLdb as my
+import MySQLdb.cursors as mycursors
+
+if sys.version_info > (3, 0):
+    import configparser as ConfigParser
+    from urllib.parse import parse_qs
+else:
+    import ConfigParser
+    from urlparse import parse_qs
 
 # for local version of up to date jsonschema
 sys.path.append(path.join(path.dirname(__file__), "..", "lib"))