diff --git a/zencoding.plugin b/zencoding.plugin
index d68901a..3f795fd 100644
--- a/zencoding.plugin
+++ b/zencoding.plugin
@@ -1,5 +1,5 @@
 [Plugin]
-Loader=python
+Loader=python3
 Module=zencoding
 IAge=3
 Name=Zen Coding
diff --git a/zencoding/__init__.py b/zencoding/__init__.py
index 6ce69f5..b6b526c 100644
--- a/zencoding/__init__.py
+++ b/zencoding/__init__.py
@@ -22,7 +22,7 @@
 from gi.repository import GObject, Gedit, Gtk, Gio
 
 import os
-from zen_editor import ZenEditor
+from .zen_editor import ZenEditor
 
 zencoding_ui_str = """
 <ui>
@@ -144,8 +144,9 @@ def update_ui(self):
         modified = os.path.getmtime(os.path.join(os.path.dirname(__file__), 'my_zen_settings.py'))
         if modified != self.modified:
             try:
-                import my_zen_settings
-                reload(my_zen_settings)
+                from . import my_zen_settings
+                import imp
+                imp.reload(my_zen_settings)
             except Exception as error:
                 md = Gtk.MessageDialog(self.window, Gtk.DIALOG_MODAL, Gtk.MESSAGE_ERROR,
                     Gtk.BUTTONS_CLOSE, "An error occured in user settings:")
@@ -243,9 +244,9 @@ def __init__(self):
         GObject.Object.__init__(self)
         self.instances = {}
 
-	def deactivate(self, window):
-		self.instances[window].deactivate()
-		del self.instances[window]
+    def deactivate(self, window):
+        self.instances[window].deactivate()
+        del self.instances[window]
 
     def do_activate(self):
         self.instances[self.window] = ZenCodingWindowHelper(self.window)
diff --git a/zencoding/html_matcher.py b/zencoding/html_matcher.py
index 4d336b4..4bf41c9 100644
--- a/zencoding/html_matcher.py
+++ b/zencoding/html_matcher.py
@@ -270,4 +270,4 @@ def find_comment_start(start_pos):
 				
 			ix += 1
 	
-	return action(opening_tag, closing_tag, start_ix)
\ No newline at end of file
+	return action(opening_tag, closing_tag, start_ix)
diff --git a/zencoding/html_navigation.py b/zencoding/html_navigation.py
index b956a39..b63c5b8 100644
--- a/zencoding/html_navigation.py
+++ b/zencoding/html_navigation.py
@@ -19,7 +19,7 @@
 
 def factorize(zen_children):
 
-	zen_children = filter(lambda s: s, zen_children)
+	zen_children = [s for s in zen_children if s]
 
 	if len(zen_children) > 1:
 	
@@ -44,7 +44,7 @@ def factorize(zen_children):
 					zen_children[index] += '>' + '>'.join(parts[1:])
 			index += 1
 		
-		zen_children = filter(lambda s: s, zen_children)
+		zen_children = [s for s in zen_children if s]
 		
 	return zen_children
 
@@ -235,9 +235,9 @@ def zenify(self, content, mode):
 				for grand_child in child.children:
 					if grand_child.type == 'value' and grand_child.start < grand_child.end and not grand_child.children:
 						if name == 'id':
-							zen_id = '#' + '#'.join(filter(lambda s: s, re.split('\s+', content[grand_child.start:grand_child.end])))
+							zen_id = '#' + '#'.join([s for s in re.split('\s+', content[grand_child.start:grand_child.end]) if s])
 						elif name == 'class':
-							zen_class = '.' + '.'.join(filter(lambda s: s, re.split('\s+', content[grand_child.start:grand_child.end])))
+							zen_class = '.' + '.'.join([s for s in re.split('\s+', content[grand_child.start:grand_child.end]) if s])
 
 			elif mode > 1 and child.type == 'attribute':
 				for grand_child in child.children:
@@ -286,21 +286,21 @@ def _parse(self, content, print_and_exit = False):
 
 		def tokens_feed():
 			tokens_re = '(<!--|-->|<\!\[CDATA\[|\]\]>|<\?|\?>|<\!|<[A-Za-z][A-Za-z0-9\-_:\.]*|</[A-Za-z][A-Za-z0-9\-_:\.]*\s*>|/?>|["\'=]|\s+)'
-			tokens = filter(lambda s: s, re.split(tokens_re, content))
+			tokens = [s for s in re.split(tokens_re, content) if s]
 			for token in tokens:
 				yield token
 
 		def get_next_token():
 			try:
-				return tokens.next()
+				return next(tokens)
 			except StopIteration:
 				return None
 
 		tokens = tokens_feed()
 		
 		if print_and_exit:
-			for token in tokens: print token, '|',
-			print
+			for token in tokens: print(token, '|', end=' ')
+			print()
 			return None
 
 		root = Node('root')
@@ -670,6 +670,6 @@ def zenify(self, offset_start, offset_end, content, mode = 3):
 '''
 	test = HtmlNavigation(content)
 	if test.tree:
-		print test.tree.show()
+		print(test.tree.show())
 		test._parse(content, True)
 
diff --git a/zencoding/image_size.py b/zencoding/image_size.py
index 1446112..e805c84 100644
--- a/zencoding/image_size.py
+++ b/zencoding/image_size.py
@@ -9,10 +9,10 @@
 '''
 
 from subprocess import Popen, PIPE
-import urllib
+import urllib.request, urllib.parse, urllib.error
 import os
 import re
-import zen_file, zen_core
+from . import zen_file, zen_core
 
 def replace_or_append(img_tag, attr_name, attr_value):
     """
diff --git a/zencoding/lorem_ipsum.py b/zencoding/lorem_ipsum.py
index 91e5d8a..98638db 100644
--- a/zencoding/lorem_ipsum.py
+++ b/zencoding/lorem_ipsum.py
@@ -223,7 +223,7 @@ def lorem_ipsum(command):
 
 if __name__ == '__main__':
 	def echo(x):
-		print x + ':', '(' + lorem_ipsum(x) + ')'
+		print(x + ':', '(' + lorem_ipsum(x) + ')')
 	echo('')
 	echo('characters')
 	echo('characters 10')
diff --git a/zencoding/stparser.py b/zencoding/stparser.py
index 75d81bb..73e9ecc 100644
--- a/zencoding/stparser.py
+++ b/zencoding/stparser.py
@@ -6,9 +6,9 @@
 '''
 from copy import deepcopy
 
+from .zen_settings import zen_settings
 import re
 import types
-from zen_settings import zen_settings
 
 _original_settings = deepcopy(zen_settings)
 
@@ -79,7 +79,7 @@ def _parse_abbreviations(obj):
 	Parses all abbreviations inside dictionary
  	@param obj: dict
 	"""
-	for key, value in obj.items():
+	for key, value in list(obj.items()):
 		key = key.strip()
 		if key[-1] == '+':
 #			this is expando, leave 'value' as is
@@ -98,12 +98,12 @@ def parse(settings):
 	in zen coding (for example, expanding abbreviation)
  	@type settings: dict
 	"""
-	for p, value in settings.items():
+	for p, value in list(settings.items()):
 		if p == 'abbreviations':
 			_parse_abbreviations(value)
 		elif p == 'extends':
 			settings[p] = [v.strip() for v in value.split(',')]
-		elif type(value) == types.DictType:
+		elif type(value) == dict:
 			parse(value)
 
 
@@ -114,8 +114,8 @@ def extend(parent, child):
 	@type parent: dict
 	@type child: dict
 	"""
-	for p, value in child.items():
-		if type(value) == types.DictType:
+	for p, value in list(child.items()):
+		if type(value) == dict:
 			if p not in parent:
 				parent[p] = {}
 			extend(parent[p], value)
@@ -129,12 +129,12 @@ def create_maps(obj):
 	Create hash maps on certain string properties of zen settings
 	@type obj: dict
 	"""
-	for p, value in obj.items():
+	for p, value in list(obj.items()):
 		if p == 'element_types':
-			for k, v in value.items():
+			for k, v in list(value.items()):
 				if isinstance(v, str):
 					value[k] = [el.strip() for el in v.split(',')]
-		elif type(value) == types.DictType:
+		elif type(value) == dict:
 			create_maps(value)
 
 
@@ -158,4 +158,4 @@ def get_settings(user_settings=None):
 	parse(settings)
 	
 	return settings
-	
\ No newline at end of file
+	
diff --git a/zencoding/zen_actions.py b/zencoding/zen_actions.py
index f28f325..153920a 100644
--- a/zencoding/zen_actions.py
+++ b/zencoding/zen_actions.py
@@ -10,7 +10,7 @@
 """
 from zencoding import zen_core as zen_coding
 from zencoding import html_matcher, zen_file
-from zen_core import char_at, ZenError
+from .zen_core import char_at, ZenError
 import re
 import base64
 
@@ -404,7 +404,7 @@ def merge_lines(editor):
 	if start != end:
 		# got range, merge lines
 		text = editor.get_content()[start:end]
-		lines = map(lambda s: re.sub(r'^\s+', '', s), zen_coding.split_by_lines(text))
+		lines = [re.sub(r'^\s+', '', s) for s in zen_coding.split_by_lines(text)]
 		text = re.sub(r'\s{2,}', ' ', ''.join(lines))
 		editor.replace_content(text, start, end)
 		editor.create_selection(start, start + len(text))
diff --git a/zencoding/zen_core.py b/zencoding/zen_core.py
index a07daab..1a3b41a 100644
--- a/zencoding/zen_core.py
+++ b/zencoding/zen_core.py
@@ -24,9 +24,10 @@
 
 @author: Sergey Chikuyonok (http://chikuyonok.ru)
 '''
-from zen_settings import zen_settings
+from .zen_settings import zen_settings
 import re
-import stparser
+from . import stparser
+import collections
 
 newline = '\n'
 "Newline symbol"
@@ -90,7 +91,7 @@ def has_deep_key(obj, key):
 	for v in key:
 		if hasattr(last_obj, v):
 			last_obj = getattr(last_obj, v)
-		elif last_obj.has_key(v):
+		elif v in last_obj:
 			last_obj = last_obj[v]
 		else:
 			return False
@@ -137,7 +138,7 @@ def create_profile(options):
 	@param options: Profile options
 	@type options: dict
 	"""
-	for k, v in default_profile.items():
+	for k, v in list(default_profile.items()):
 		options.setdefault(k, v)
 	
 	return options
@@ -189,7 +190,7 @@ def pad_string(text, pad):
 	"""
 	pad_str = ''
 	result = ''
-	if isinstance(pad, basestring):
+	if isinstance(pad, str):
 		pad_str = pad
 	else:
 		pad_str = get_indentation() * pad
@@ -572,7 +573,7 @@ def rollout_tree(tree, parent=None):
 			add_point = tag.find_deepest_child() or tag
 			
 			if tag_content:
-				if isinstance(tag_content, basestring):
+				if isinstance(tag_content, str):
 					add_point.content = tag_content
 				else:
 					add_point.content = tag_content[j] or ''
@@ -587,15 +588,15 @@ def run_filters(tree, profile, filter_list):
 	@param filter_list: str, list
 	@return: ZenNode
 	"""
-	import filters
+	from . import filters
 	
-	if isinstance(profile, basestring) and profile in profiles:
+	if isinstance(profile, str) and profile in profiles:
 		profile = profiles[profile];
 	
 	if not profile:
 		profile = profiles['plain']
 		
-	if isinstance(filter_list, basestring):
+	if isinstance(filter_list, str):
 		filter_list = re.split(r'[\|,]', filter_list)
 		
 	for name in filter_list:
@@ -735,7 +736,7 @@ def replace_unescaped_symbol(text, symbol, replace):
 			cur_sl = sl
 			match_count += 1
 			new_value = replace
-			if callable(new_value):
+			if isinstance(new_value, collections.Callable):
 				replace_data = replace(text, symbol, i, match_count)
 				if replace_data:
 					cur_sl = len(replace_data[0])
@@ -769,7 +770,7 @@ def run_action(name, *args, **kwargs):
 	 zen_coding.run_actions('expand_abbreviation', zen_editor)
 	 zen_coding.run_actions('wrap_with_abbreviation', zen_editor, 'div')  
 	"""
-	import zen_actions
+	from . import zen_actions
 	
 	if hasattr(zen_actions, name):
 		return getattr(zen_actions, name)(*args, **kwargs)
@@ -908,7 +909,7 @@ def get_caret_placeholder():
 	Returns caret placeholder
 	@return: str
 	"""
-	if callable(caret_placeholder):
+	if isinstance(caret_placeholder, collections.Callable):
 		return caret_placeholder()
 	else:
 		return caret_placeholder
@@ -942,7 +943,7 @@ def apply_filters(tree, syntax, profile, additional_filters=None):
 		
 	if additional_filters:
 		_filters += '|'
-		if isinstance(additional_filters, basestring):
+		if isinstance(additional_filters, str):
 			_filters += additional_filters
 		else:
 			_filters += '|'.join(additional_filters)
@@ -1092,7 +1093,7 @@ def __init__(self, name, count=1, doc_type='html'):
 		self._abbr = abbr
 		self.__content = ''
 		self.repeat_by_lines = False
-		self._res = zen_settings.has_key(doc_type) and zen_settings[doc_type] or {}
+		self._res = doc_type in zen_settings and zen_settings[doc_type] or {}
 		self.parent = None
 		
 		# add default attributes
diff --git a/zencoding/zen_editor.py b/zencoding/zen_editor.py
index 3a9e98f..a0a61ba 100644
--- a/zencoding/zen_editor.py
+++ b/zencoding/zen_editor.py
@@ -17,19 +17,20 @@
 
 import sys, os, re, locale
 
-import zen_core, zen_actions, zen_file, html_matcher
-from image_size import update_image_size
+from .import zen_core, zen_actions, zen_file, html_matcher
+from .image_size import update_image_size
 
-import zen_dialog
-from html_navigation import HtmlNavigation
-from lorem_ipsum import lorem_ipsum
+from .import zen_dialog
+
+from .html_navigation import HtmlNavigation
+from .lorem_ipsum import lorem_ipsum
 
 try:
     sys.path.append('/usr/lib/gedit/plugins/')
     from snippets import Document as SnippetDocument
     USE_SNIPPETS = True
 except:
-    print 'failed importing snippets'
+    print('failed importing snippets')
     USE_SNIPPETS = False