diff --git a/addon.xml b/addon.xml
index 6ce47b5..921b040 100644
--- a/addon.xml
+++ b/addon.xml
@@ -1,10 +1,10 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <addon id="plugin.video.example"
-version="2.3.1"
+version="2.4.0"
 name="Example Kodi Video Plugin"
 provider-name="Roman_V_M">
 <requires>
-  <import addon="xbmc.python" version="2.25.0"/>
+  <import addon="xbmc.python" version="3.0.0"/>
 </requires>
 <extension point="xbmc.python.pluginsource" library="main.py">
   <provides>video</provides>
diff --git a/main.py b/main.py
index 169cbd2..fd1e27a 100644
--- a/main.py
+++ b/main.py
@@ -1,12 +1,12 @@
-# -*- coding: utf-8 -*-
-# Module: default
+# Module: main
 # Author: Roman V. M.
 # Created on: 28.11.2014
 # License: GPL v.3 https://www.gnu.org/copyleft/gpl.html
-
+"""
+Example video plugin that is compatible with Kodi 19.x "Matrix" and above
+"""
 import sys
-from urllib import urlencode
-from urlparse import parse_qsl
+from urllib.parse import urlencode, parse_qsl
 import xbmcgui
 import xbmcplugin
 
@@ -65,7 +65,6 @@ def get_url(**kwargs):
     Create a URL for calling the plugin recursively from the given set of keyword arguments.
 
     :param kwargs: "argument=value" pairs
-    :type kwargs: dict
     :return: plugin call URL
     :rtype: str
     """
@@ -86,7 +85,7 @@ def get_categories():
     :return: The list of video categories
     :rtype: types.GeneratorType
     """
-    return VIDEOS.iterkeys()
+    return VIDEOS.keys()
 
 
 def get_videos(category):