diff --git a/deluge/config.py b/deluge/config.py
index 9e3ee9187..808e5b587 100644
--- a/deluge/config.py
+++ b/deluge/config.py
@@ -41,7 +41,6 @@ version as this will be done internally.
 """
 from __future__ import unicode_literals
 
-import cPickle as pickle
 import json
 import logging
 import os
@@ -49,6 +48,8 @@ import shutil
 from codecs import getwriter
 from io import open
 
+import six.moves.cPickle as pickle
+
 from deluge.common import JSON_FORMAT, get_default_config_dir
 
 log = logging.getLogger(__name__)
diff --git a/deluge/core/torrentmanager.py b/deluge/core/torrentmanager.py
index 86ad76466..38cdcbf49 100644
--- a/deluge/core/torrentmanager.py
+++ b/deluge/core/torrentmanager.py
@@ -10,13 +10,13 @@
 """TorrentManager handles Torrent objects"""
 from __future__ import unicode_literals
 
-import cPickle as pickle
 import datetime
 import logging
 import operator
 import os
 import time
 
+import six.moves.cPickle as pickle
 from twisted.internet import defer, error, reactor, threads
 from twisted.internet.defer import Deferred, DeferredList
 from twisted.internet.task import LoopingCall
diff --git a/deluge/event.py b/deluge/event.py
index b80e12936..b6a48508b 100644
--- a/deluge/event.py
+++ b/deluge/event.py
@@ -16,6 +16,8 @@ and subsequently emitted to the clients.
 """
 from __future__ import unicode_literals
 
+import six
+
 known_events = {}
 
 
@@ -29,7 +31,7 @@ class DelugeEventMetaClass(type):
             known_events[name] = cls
 
 
-class DelugeEvent(object):
+class DelugeEvent(six.with_metaclass(DelugeEventMetaClass, object)):
     """
     The base class for all events.
 
@@ -39,7 +41,6 @@ class DelugeEvent(object):
     :type args: list
 
     """
-    __metaclass__ = DelugeEventMetaClass
 
     def _get_name(self):
         return self.__class__.__name__
diff --git a/deluge/plugins/Blocklist/deluge/plugins/blocklist/common.py b/deluge/plugins/Blocklist/deluge/plugins/blocklist/common.py
index 5a9d525a3..1d4fe9ae6 100644
--- a/deluge/plugins/Blocklist/deluge/plugins/blocklist/common.py
+++ b/deluge/plugins/Blocklist/deluge/plugins/blocklist/common.py
@@ -18,6 +18,7 @@ import os.path
 from functools import wraps
 from sys import exc_info
 
+import six
 from pkg_resources import resource_filename
 
 
@@ -44,7 +45,7 @@ def raises_errors_as(error):
                 return func(self, *args, **kwargs)
             except Exception:
                 (value, tb) = exc_info()[1:]
-                raise error, value, tb
+                six.reraise(error, value, tb)
         return wrapper
     return decorator
 
diff --git a/deluge/ui/gtkui/common.py b/deluge/ui/gtkui/common.py
index 8ba48d26a..c6622f1e0 100644
--- a/deluge/ui/gtkui/common.py
+++ b/deluge/ui/gtkui/common.py
@@ -10,12 +10,12 @@
 from __future__ import unicode_literals
 
 import contextlib
-import cPickle as pickle
 import logging
 import os
 import shutil
 import sys
 
+import six.moves.cPickle as pickle
 from gobject import GError
 from gtk import SORT_ASCENDING, Menu, MenuItem, RadioMenuItem, SeparatorMenuItem, clipboard_get, icon_theme_get_default
 from gtk.gdk import COLORSPACE_RGB, SELECTION_PRIMARY, Pixbuf, pixbuf_new_from_file, pixbuf_new_from_file_at_size
diff --git a/deluge/ui/gtkui/files_tab.py b/deluge/ui/gtkui/files_tab.py
index 7cb31e437..94ee359a4 100644
--- a/deluge/ui/gtkui/files_tab.py
+++ b/deluge/ui/gtkui/files_tab.py
@@ -9,11 +9,11 @@
 
 from __future__ import division, unicode_literals
 
-import cPickle as pickle
 import logging
 import os.path
 
 import gtk
+import six.moves.cPickle as pickle
 from gobject import TYPE_UINT64
 from gtk.gdk import ACTION_DEFAULT, ACTION_MOVE, BUTTON1_MASK, keyval_name  # pylint: disable=ungrouped-imports
 
diff --git a/deluge/ui/translations_util.py b/deluge/ui/translations_util.py
index 2491609bc..e82d0cbce 100644
--- a/deluge/ui/translations_util.py
+++ b/deluge/ui/translations_util.py
@@ -9,13 +9,14 @@
 
 from __future__ import unicode_literals
 
-import __builtin__
 import gettext
 import locale
 import logging
 import os
 import sys
 
+from six.moves import builtins
+
 import deluge.common
 
 log = logging.getLogger(__name__)
@@ -28,8 +29,8 @@ def set_dummy_trans(warn_msg=None):
         if warn_msg:
             log.warn('"%s" has been marked for translation, but translation is unavailable.', txt[0])
         return txt[0]
-    __builtin__.__dict__['_'] = _func
-    __builtin__.__dict__['ngettext'] = __builtin__.__dict__['_n'] = _func
+    builtins.__dict__['_'] = _func
+    builtins.__dict__['ngettext'] = builtins.__dict__['_n'] = _func
 
 
 def get_translations_path():
@@ -127,7 +128,7 @@ def setup_translations(setup_gettext=True, setup_pygtk=False):
             kwargs = {} if not deluge.common.PY2 else {'unicode': True}
 
             gettext.install(domain, translations_path, names='ngettext', **kwargs)
-            __builtin__.__dict__['_n'] = __builtin__.__dict__['ngettext']
+            builtins.__dict__['_n'] = builtins.__dict__['ngettext']
         except Exception as ex:
             log.error('Unable to initialize gettext/locale!')
             log.exception(ex)