diff --git a/deluge/plugins/AutoAdd/deluge/plugins/autoadd/__init__.py b/deluge/plugins/AutoAdd/deluge/plugins/autoadd/__init__.py
index b93d89a45..a409cfcce 100644
--- a/deluge/plugins/AutoAdd/deluge/plugins/autoadd/__init__.py
+++ b/deluge/plugins/AutoAdd/deluge/plugins/autoadd/__init__.py
@@ -25,12 +25,12 @@ class CorePlugin(PluginInitBase):
         super(CorePlugin, self).__init__(plugin_name)
 
 
-class GtkUIPlugin(PluginInitBase):
+class Gtk3UIPlugin(PluginInitBase):
     def __init__(self, plugin_name):
         from .gtkui import GtkUI as _pluginCls
 
         self._plugin_cls = _pluginCls
-        super(GtkUIPlugin, self).__init__(plugin_name)
+        super(Gtk3UIPlugin, self).__init__(plugin_name)
 
 
 class WebUIPlugin(PluginInitBase):
diff --git a/deluge/plugins/AutoAdd/deluge/plugins/autoadd/data/autoadd_options.ui b/deluge/plugins/AutoAdd/deluge/plugins/autoadd/data/autoadd_options.ui
index e6ba56f4a..28be8b8f2 100644
--- a/deluge/plugins/AutoAdd/deluge/plugins/autoadd/data/autoadd_options.ui
+++ b/deluge/plugins/AutoAdd/deluge/plugins/autoadd/data/autoadd_options.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="2.24"/>
+  <requires lib="gtk+" version="3.0"/>
   <!-- interface-naming-policy toplevel-contextual -->
   <object class="GtkAdjustment" id="adjustment1">
     <property name="lower">-1</property>
diff --git a/deluge/plugins/AutoAdd/deluge/plugins/autoadd/data/config.ui b/deluge/plugins/AutoAdd/deluge/plugins/autoadd/data/config.ui
index c60e10f36..52aa4709e 100644
--- a/deluge/plugins/AutoAdd/deluge/plugins/autoadd/data/config.ui
+++ b/deluge/plugins/AutoAdd/deluge/plugins/autoadd/data/config.ui
@@ -1,9 +1,12 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!-- Generated with glade 3.22.1 -->
 <interface>
-  <requires lib="gtk+" version="2.24"/>
-  <!-- interface-naming-policy toplevel-contextual -->
+  <requires lib="gtk+" version="3.0"/>
   <object class="GtkWindow" id="prefs_window">
     <property name="can_focus">False</property>
+    <child>
+      <placeholder/>
+    </child>
     <child>
       <object class="GtkHBox" id="hbox9">
         <property name="visible">True</property>
diff --git a/deluge/plugins/AutoAdd/deluge/plugins/autoadd/gtkui.py b/deluge/plugins/AutoAdd/deluge/plugins/autoadd/gtkui.py
index 99a70c04f..6942996e1 100644
--- a/deluge/plugins/AutoAdd/deluge/plugins/autoadd/gtkui.py
+++ b/deluge/plugins/AutoAdd/deluge/plugins/autoadd/gtkui.py
@@ -17,14 +17,21 @@ from __future__ import unicode_literals
 import logging
 import os
 
-import gtk
+import gi  # isort:skip (Required before Gtk import).
 
+gi.require_version('Gtk', '3.0')  # NOQA: E402
+
+# isort:imports-thirdparty
+from gi.repository import Gtk
+
+# isort:imports-firstparty
 import deluge.common
 import deluge.component as component
-from deluge.plugins.pluginbase import GtkPluginBase
+from deluge.plugins.pluginbase import Gtk3PluginBase
 from deluge.ui.client import client
-from deluge.ui.gtkui import dialogs
+from deluge.ui.gtk3 import dialogs
 
+# isort:imports-localfolder
 from .common import get_resource
 
 log = logging.getLogger(__name__)
@@ -47,14 +54,15 @@ class OptionsDialog(object):
     ]
 
     def __init__(self):
-        self.accounts = gtk.ListStore(str)
-        self.labels = gtk.ListStore(str)
+        log.critical('I')
+        self.accounts = Gtk.ListStore(str)
+        self.labels = Gtk.ListStore(str)
         self.core_config = {}
 
     def show(self, options=None, watchdir_id=None):
         if options is None:
             options = {}
-        self.builder = gtk.Builder()
+        self.builder = Gtk.Builder()
         self.builder.add_from_file(get_resource('autoadd_options.ui'))
         self.builder.connect_signals(
             {
@@ -103,7 +111,7 @@ class OptionsDialog(object):
         self.accounts.clear()
         self.labels.clear()
         combobox = self.builder.get_object('OwnerCombobox')
-        combobox_render = gtk.CellRendererText()
+        combobox_render = Gtk.CellRendererText()
         combobox.pack_start(combobox_render, True)
         combobox.add_attribute(combobox_render, 'text', 0)
         combobox.set_model(self.accounts)
@@ -413,10 +421,11 @@ class OptionsDialog(object):
         return options
 
 
-class GtkUI(GtkPluginBase):
+class GtkUI(Gtk3PluginBase):
     def enable(self):
+        log.critical('A')
 
-        self.builder = gtk.Builder()
+        self.builder = Gtk.Builder()
         self.builder.add_from_file(get_resource('config.ui'))
         self.builder.connect_signals(self)
         self.opts_dialog = OptionsDialog()
@@ -434,15 +443,15 @@ class GtkUI(GtkPluginBase):
         self.watchdirs = {}
 
         vbox = self.builder.get_object('watchdirs_vbox')
-        sw = gtk.ScrolledWindow()
-        sw.set_shadow_type(gtk.SHADOW_ETCHED_IN)
-        sw.set_policy(gtk.POLICY_AUTOMATIC, gtk.POLICY_AUTOMATIC)
+        sw = Gtk.ScrolledWindow()
+        sw.set_shadow_type(Gtk.ShadowType.ETCHED_IN)
+        sw.set_policy(Gtk.PolicyType.AUTOMATIC, Gtk.PolicyType.AUTOMATIC)
 
         vbox.pack_start(sw, True, True, 0)
 
         self.store = self.create_model()
 
-        self.treeView = gtk.TreeView(self.store)
+        self.treeView = Gtk.TreeView(self.store)
         self.treeView.connect('cursor-changed', self.on_listitem_activated)
         self.treeView.connect('row-activated', self.on_edit_button_clicked)
         self.treeView.set_rules_hint(True)
@@ -464,7 +473,7 @@ class GtkUI(GtkPluginBase):
         )
 
     def create_model(self):
-        store = gtk.ListStore(str, bool, str, str)
+        store = Gtk.ListStore(str, bool, str, str)
         for watchdir_id, watchdir in self.watchdirs.items():
             store.append(
                 [
@@ -477,29 +486,29 @@ class GtkUI(GtkPluginBase):
         return store
 
     def create_columns(self, treeview):
-        renderer_toggle = gtk.CellRendererToggle()
-        column = gtk.TreeViewColumn(
+        renderer_toggle = Gtk.CellRendererToggle()
+        column = Gtk.TreeViewColumn(
             _('Active'), renderer_toggle, activatable=1, active=1
         )
         column.set_sort_column_id(1)
         treeview.append_column(column)
-        tt = gtk.Tooltip()
+        tt = Gtk.Tooltip()
         tt.set_text(_('Double-click to toggle'))
         treeview.set_tooltip_cell(tt, None, None, renderer_toggle)
 
-        renderertext = gtk.CellRendererText()
-        column = gtk.TreeViewColumn(_('Owner'), renderertext, text=2)
+        renderertext = Gtk.CellRendererText()
+        column = Gtk.TreeViewColumn(_('Owner'), renderertext, text=2)
         column.set_sort_column_id(2)
         treeview.append_column(column)
-        tt2 = gtk.Tooltip()
+        tt2 = Gtk.Tooltip()
         tt2.set_text(_('Double-click to edit'))
         treeview.set_has_tooltip(True)
 
-        renderertext = gtk.CellRendererText()
-        column = gtk.TreeViewColumn(_('Path'), renderertext, text=3)
+        renderertext = Gtk.CellRendererText()
+        column = Gtk.TreeViewColumn(_('Path'), renderertext, text=3)
         column.set_sort_column_id(3)
         treeview.append_column(column)
-        tt2 = gtk.Tooltip()
+        tt2 = Gtk.Tooltip()
         tt2.set_text(_('Double-click to edit'))
         treeview.set_has_tooltip(True)
 
diff --git a/deluge/plugins/AutoAdd/setup.py b/deluge/plugins/AutoAdd/setup.py
index 56a9b5bad..2fe68efb6 100644
--- a/deluge/plugins/AutoAdd/setup.py
+++ b/deluge/plugins/AutoAdd/setup.py
@@ -18,7 +18,7 @@ from setuptools import find_packages, setup
 __plugin_name__ = 'AutoAdd'
 __author__ = 'Chase Sterling, Pedro Algarvio'
 __author_email__ = 'chase.sterling@gmail.com, pedro@algarvio.me'
-__version__ = '1.7'
+__version__ = '1.8'
 __url__ = 'http://dev.deluge-torrent.org/wiki/Plugins/AutoAdd'
 __license__ = 'GPLv3'
 __description__ = 'Monitors folders for .torrent files.'
@@ -42,8 +42,8 @@ setup(
     entry_points="""
     [deluge.plugin.core]
     %s = deluge.plugins.%s:CorePlugin
-    [deluge.plugin.gtkui]
-    %s = deluge.plugins.%s:GtkUIPlugin
+    [deluge.plugin.gtk3ui]
+    %s = deluge.plugins.%s:Gtk3UIPlugin
     [deluge.plugin.web]
     %s = deluge.plugins.%s:WebUIPlugin
     """
diff --git a/deluge/plugins/Blocklist/deluge/plugins/blocklist/data/blocklist_pref.ui b/deluge/plugins/Blocklist/deluge/plugins/blocklist/data/blocklist_pref.ui
index ac5da9db7..e8b48c363 100644
--- a/deluge/plugins/Blocklist/deluge/plugins/blocklist/data/blocklist_pref.ui
+++ b/deluge/plugins/Blocklist/deluge/plugins/blocklist/data/blocklist_pref.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="2.24"/>
+  <requires lib="gtk+" version="3.0"/>
   <!-- interface-naming-policy toplevel-contextual -->
   <object class="GtkAdjustment" id="adjustment1">
     <property name="lower">1</property>
diff --git a/deluge/plugins/Blocklist/deluge/plugins/blocklist/gtkui.py b/deluge/plugins/Blocklist/deluge/plugins/blocklist/gtkui.py
index ad73a45e6..24f7060fd 100644
--- a/deluge/plugins/Blocklist/deluge/plugins/blocklist/gtkui.py
+++ b/deluge/plugins/Blocklist/deluge/plugins/blocklist/gtkui.py
@@ -12,19 +12,26 @@ from __future__ import unicode_literals
 import logging
 from datetime import datetime
 
-import gtk
+import gi  # isort:skip (Required before Gtk import).
 
+gi.require_version('Gtk', '3.0')  # NOQA: E402
+
+# isort:imports-thirdparty
+from gi.repository import Gtk
+
+# isort:imports-firstparty
 import deluge.common
 import deluge.component as component
-from deluge.plugins.pluginbase import GtkPluginBase
+from deluge.plugins.pluginbase import Gtk3PluginBase
 from deluge.ui.client import client
 
+# isort:imports-localfolder
 from . import common
 
 log = logging.getLogger(__name__)
 
 
-class GtkUI(GtkPluginBase):
+class GtkUI(Gtk3PluginBase):
     def enable(self):
         log.debug('Blocklist GtkUI enable..')
         self.plugin = component.get('PluginManager')
@@ -151,7 +158,7 @@ class GtkUI(GtkPluginBase):
     def load_preferences_page(self):
         """Initializes the preferences page and adds it to the preferences dialog"""
         # Load the preferences page
-        self.builder = gtk.Builder()
+        self.builder = Gtk.Builder()
         self.builder.add_from_file(common.get_resource('blocklist_pref.ui'))
 
         self.whitelist_frame = self.builder.get_object('whitelist_frame')
@@ -203,12 +210,12 @@ class GtkUI(GtkPluginBase):
         treeview_selection.connect(
             'changed', self.on_whitelist_treeview_selection_changed
         )
-        self.whitelist_model = gtk.ListStore(str, bool)
-        renderer = gtk.CellRendererText()
+        self.whitelist_model = Gtk.ListStore(str, bool)
+        renderer = Gtk.CellRendererText()
         renderer.connect('edited', self.on_cell_edited, self.whitelist_model)
         renderer.set_data('ip', 0)
 
-        column = gtk.TreeViewColumn('IPs', renderer, text=0, editable=1)
+        column = Gtk.TreeViewColumn('IPs', renderer, text=0, editable=1)
         column.set_expand(True)
         self.whitelist_treeview.append_column(column)
         self.whitelist_treeview.set_model(self.whitelist_model)
diff --git a/deluge/plugins/Blocklist/setup.py b/deluge/plugins/Blocklist/setup.py
index 6d7f01253..1d21847d8 100644
--- a/deluge/plugins/Blocklist/setup.py
+++ b/deluge/plugins/Blocklist/setup.py
@@ -12,7 +12,7 @@ from setuptools import find_packages, setup
 __plugin_name__ = 'Blocklist'
 __author__ = 'John Garland'
 __author_email__ = 'johnnybg+deluge@gmail.com'
-__version__ = '1.3'
+__version__ = '1.4'
 __url__ = 'http://deluge-torrent.org'
 __license__ = 'GPLv3'
 __description__ = 'Download and import IP blocklists'
@@ -35,7 +35,7 @@ setup(
     entry_points="""
     [deluge.plugin.core]
     %s = deluge.plugins.%s:CorePlugin
-    [deluge.plugin.gtkui]
+    [deluge.plugin.gtk3ui]
     %s = deluge.plugins.%s:GtkUIPlugin
     [deluge.plugin.web]
     %s = deluge.plugins.%s:WebUIPlugin
diff --git a/deluge/plugins/Execute/deluge/plugins/execute/data/execute_prefs.ui b/deluge/plugins/Execute/deluge/plugins/execute/data/execute_prefs.ui
index 646d87a71..cd9b4d4c0 100644
--- a/deluge/plugins/Execute/deluge/plugins/execute/data/execute_prefs.ui
+++ b/deluge/plugins/Execute/deluge/plugins/execute/data/execute_prefs.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="2.24"/>
+  <requires lib="gtk+" version="3.0"/>
   <!-- interface-naming-policy project-wide -->
   <object class="GtkListStore" id="liststore1">
     <columns>
diff --git a/deluge/plugins/Execute/deluge/plugins/execute/gtkui.py b/deluge/plugins/Execute/deluge/plugins/execute/gtkui.py
index a2b4f5f68..04bb06862 100644
--- a/deluge/plugins/Execute/deluge/plugins/execute/gtkui.py
+++ b/deluge/plugins/Execute/deluge/plugins/execute/gtkui.py
@@ -11,16 +11,21 @@ from __future__ import unicode_literals
 
 import logging
 
-import gtk
+import gi  # isort:skip (Required before Gtk import).
 
+gi.require_version('Gtk', '3.0')  # NOQA: E402
+
+# isort:imports-thirdparty
+from gi.repository import Gtk
+
+# isort:imports-firstparty
 import deluge.component as component
-from deluge.plugins.pluginbase import GtkPluginBase
+from deluge.plugins.pluginbase import Gtk3PluginBase
 from deluge.ui.client import client
 
+# isort:imports-localfolder
 from . import common
 
-# Relative import
-
 log = logging.getLogger(__name__)
 
 EXECUTE_ID = 0
@@ -42,13 +47,13 @@ class ExecutePreferences(object):
 
     def load(self):
         log.debug('Adding Execute Preferences page')
-        self.builder = gtk.Builder()
+        self.builder = Gtk.Builder()
         self.builder.add_from_file(common.get_resource('execute_prefs.ui'))
         self.builder.connect_signals(self)
 
         events = self.builder.get_object('event_combobox')
 
-        store = gtk.ListStore(str, str)
+        store = Gtk.ListStore(str, str)
         for event in EVENTS:
             event_label = EVENT_MAP[event]
             store.append((event_label, event))
@@ -78,17 +83,17 @@ class ExecutePreferences(object):
     def add_command(self, command_id, event, command):
         log.debug('Adding command `%s`', command_id)
         vbox = self.builder.get_object('commands_vbox')
-        hbox = gtk.HBox(False, 5)
+        hbox = Gtk.HBox(False, 5)
         hbox.set_name(command_id + '_' + event)
-        label = gtk.Label(EVENT_MAP[event])
-        entry = gtk.Entry()
+        label = Gtk.Label(EVENT_MAP[event])
+        entry = Gtk.Entry()
         entry.set_text(command)
-        button = gtk.Button()
+        button = Gtk.Button()
         button.set_name('remove_%s' % command_id)
         button.connect('clicked', self.on_remove_button_clicked)
 
-        img = gtk.Image()
-        img.set_from_stock(gtk.STOCK_REMOVE, gtk.ICON_SIZE_BUTTON)
+        img = Gtk.Image()
+        img.set_from_stock(Gtk.STOCK_REMOVE, Gtk.IconSize.BUTTON)
         button.set_image(img)
 
         hbox.pack_start(label, False, False)
@@ -137,7 +142,7 @@ class ExecutePreferences(object):
         for child in children:
             command_id, event = child.get_name().split('_')
             for widget in child.get_children():
-                if isinstance(widget, gtk.Entry):
+                if isinstance(widget, Gtk.Entry):
                     command = widget.get_text()
             client.execute.save_command(command_id, event, command)
 
@@ -150,7 +155,7 @@ class ExecutePreferences(object):
         self.remove_command(command_id)
 
 
-class GtkUI(GtkPluginBase):
+class GtkUI(Gtk3PluginBase):
     def enable(self):
         self.plugin = component.get('PluginManager')
         self.preferences = ExecutePreferences(self.plugin)
diff --git a/deluge/plugins/Execute/setup.py b/deluge/plugins/Execute/setup.py
index 5bee45635..d2156a8df 100644
--- a/deluge/plugins/Execute/setup.py
+++ b/deluge/plugins/Execute/setup.py
@@ -12,7 +12,7 @@ from setuptools import find_packages, setup
 __plugin_name__ = 'Execute'
 __author__ = 'Damien Churchill'
 __author_email__ = 'damoxc@gmail.com'
-__version__ = '1.2'
+__version__ = '1.3'
 __url__ = 'http://deluge-torrent.org'
 __license__ = 'GPLv3'
 __description__ = 'Plugin to execute a command upon an event'
@@ -34,7 +34,7 @@ setup(
     entry_points="""
     [deluge.plugin.core]
     %s = deluge.plugins.%s:CorePlugin
-    [deluge.plugin.gtkui]
+    [deluge.plugin.gtk3ui]
     %s = deluge.plugins.%s:GtkUIPlugin
     [deluge.plugin.web]
     %s = deluge.plugins.%s:WebUIPlugin
diff --git a/deluge/plugins/Extractor/deluge/plugins/extractor/data/extractor_prefs.ui b/deluge/plugins/Extractor/deluge/plugins/extractor/data/extractor_prefs.ui
index 1652980eb..040e3d0e7 100644
--- a/deluge/plugins/Extractor/deluge/plugins/extractor/data/extractor_prefs.ui
+++ b/deluge/plugins/Extractor/deluge/plugins/extractor/data/extractor_prefs.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="2.24"/>
+  <requires lib="gtk+" version="3.0"/>
   <!-- interface-naming-policy toplevel-contextual -->
   <object class="GtkWindow" id="window1">
     <property name="can_focus">False</property>
diff --git a/deluge/plugins/Extractor/deluge/plugins/extractor/gtkui.py b/deluge/plugins/Extractor/deluge/plugins/extractor/gtkui.py
index aaae29a93..113b33f6d 100644
--- a/deluge/plugins/Extractor/deluge/plugins/extractor/gtkui.py
+++ b/deluge/plugins/Extractor/deluge/plugins/extractor/gtkui.py
@@ -15,20 +15,27 @@ from __future__ import unicode_literals
 
 import logging
 
-import gtk
+import gi  # isort:skip (Required before Gtk import).
 
+gi.require_version('Gtk', '3.0')  # NOQA: E402
+
+# isort:imports-thirdparty
+from gi.repository import Gtk
+
+# isort:imports-firstparty
 import deluge.component as component
-from deluge.plugins.pluginbase import GtkPluginBase
+from deluge.plugins.pluginbase import Gtk3PluginBase
 from deluge.ui.client import client
 
+# isort:imports-localfolder
 from .common import get_resource
 
 log = logging.getLogger(__name__)
 
 
-class GtkUI(GtkPluginBase):
+class GtkUI(Gtk3PluginBase):
     def enable(self):
-        self.builder = gtk.Builder()
+        self.builder = Gtk.Builder()
         self.builder.add_from_file(get_resource('extractor_prefs.ui'))
 
         component.get('Preferences').add_page(
diff --git a/deluge/plugins/Extractor/setup.py b/deluge/plugins/Extractor/setup.py
index 7426c690a..dded10238 100644
--- a/deluge/plugins/Extractor/setup.py
+++ b/deluge/plugins/Extractor/setup.py
@@ -16,7 +16,7 @@ from setuptools import find_packages, setup
 __plugin_name__ = 'Extractor'
 __author__ = 'Andrew Resch'
 __author_email__ = 'andrewresch@gmail.com'
-__version__ = '0.6'
+__version__ = '0.7'
 __url__ = 'http://deluge-torrent.org'
 __license__ = 'GPLv3'
 __description__ = 'Extract files upon torrent completion'
@@ -47,7 +47,7 @@ setup(
     entry_points="""
     [deluge.plugin.core]
     %s = deluge.plugins.%s:CorePlugin
-    [deluge.plugin.gtkui]
+    [deluge.plugin.gtk3ui]
     %s = deluge.plugins.%s:GtkUIPlugin
     [deluge.plugin.web]
     %s = deluge.plugins.%s:WebUIPlugin
diff --git a/deluge/plugins/Label/deluge/plugins/label/data/label_add.ui b/deluge/plugins/Label/deluge/plugins/label/data/label_add.ui
index 1e46cfcae..886150317 100644
--- a/deluge/plugins/Label/deluge/plugins/label/data/label_add.ui
+++ b/deluge/plugins/Label/deluge/plugins/label/data/label_add.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="2.24"/>
+  <requires lib="gtk+" version="3.0"/>
   <!-- interface-naming-policy toplevel-contextual -->
   <object class="GtkDialog" id="dlg_label_add">
     <property name="can_focus">False</property>
@@ -25,7 +25,6 @@
             <child>
               <object class="GtkButton" id="button2">
                 <property name="label">gtk-cancel</property>
-                <property name="use_action_appearance">False</property>
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">True</property>
@@ -41,7 +40,6 @@
             <child>
               <object class="GtkButton" id="button1">
                 <property name="label">gtk-ok</property>
-                <property name="use_action_appearance">False</property>
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="can_default">True</property>
diff --git a/deluge/plugins/Label/deluge/plugins/label/data/label_options.ui b/deluge/plugins/Label/deluge/plugins/label/data/label_options.ui
index 883476115..54949a759 100644
--- a/deluge/plugins/Label/deluge/plugins/label/data/label_options.ui
+++ b/deluge/plugins/Label/deluge/plugins/label/data/label_options.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="2.24"/>
+  <requires lib="gtk+" version="3.0"/>
   <!-- interface-naming-policy toplevel-contextual -->
   <object class="GtkAdjustment" id="adjustment1">
     <property name="lower">-1</property>
@@ -59,7 +59,6 @@
             <child>
               <object class="GtkButton" id="button4">
                 <property name="label">gtk-cancel</property>
-                <property name="use_action_appearance">False</property>
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">True</property>
@@ -75,7 +74,6 @@
             <child>
               <object class="GtkButton" id="button3">
                 <property name="label">gtk-ok</property>
-                <property name="use_action_appearance">False</property>
                 <property name="visible">True</property>
                 <property name="can_focus">True</property>
                 <property name="receives_default">True</property>
@@ -379,7 +377,6 @@
                 <child type="label">
                   <object class="GtkCheckButton" id="apply_max">
                     <property name="label" translatable="yes">Apply per torrent max settings:</property>
-                    <property name="use_action_appearance">False</property>
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="receives_default">False</property>
@@ -432,7 +429,6 @@
                         <child>
                           <object class="GtkCheckButton" id="is_auto_managed">
                             <property name="label" translatable="yes">Auto Managed</property>
-                            <property name="use_action_appearance">False</property>
                             <property name="visible">True</property>
                             <property name="can_focus">True</property>
                             <property name="receives_default">False</property>
@@ -446,7 +442,6 @@
                         <child>
                           <object class="GtkCheckButton" id="stop_at_ratio">
                             <property name="label" translatable="yes">Stop seed at ratio:</property>
-                            <property name="use_action_appearance">False</property>
                             <property name="visible">True</property>
                             <property name="can_focus">True</property>
                             <property name="receives_default">False</property>
@@ -462,7 +457,6 @@
                         <child>
                           <object class="GtkCheckButton" id="remove_at_ratio">
                             <property name="label" translatable="yes">Remove at ratio</property>
-                            <property name="use_action_appearance">False</property>
                             <property name="visible">True</property>
                             <property name="can_focus">True</property>
                             <property name="receives_default">False</property>
@@ -529,7 +523,6 @@
                 <child type="label">
                   <object class="GtkCheckButton" id="apply_queue">
                     <property name="label" translatable="yes">Apply Queue settings:</property>
-                    <property name="use_action_appearance">False</property>
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="receives_default">False</property>
@@ -573,7 +566,6 @@
                         <child>
                           <object class="GtkCheckButton" id="move_completed">
                             <property name="label" translatable="yes">Move completed to:</property>
-                            <property name="use_action_appearance">False</property>
                             <property name="visible">True</property>
                             <property name="can_focus">True</property>
                             <property name="receives_default">False</property>
@@ -631,7 +623,6 @@
                 <child type="label">
                   <object class="GtkCheckButton" id="apply_move_completed">
                     <property name="label" translatable="yes">Apply folder settings:</property>
-                    <property name="use_action_appearance">False</property>
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="receives_default">False</property>
@@ -711,7 +702,6 @@
                 <child type="label">
                   <object class="GtkCheckButton" id="auto_add">
                     <property name="label" translatable="yes">Automatically apply label:</property>
-                    <property name="use_action_appearance">False</property>
                     <property name="visible">True</property>
                     <property name="can_focus">True</property>
                     <property name="receives_default">False</property>
diff --git a/deluge/plugins/Label/deluge/plugins/label/data/label_pref.ui b/deluge/plugins/Label/deluge/plugins/label/data/label_pref.ui
index 4123f33da..04a892357 100644
--- a/deluge/plugins/Label/deluge/plugins/label/data/label_pref.ui
+++ b/deluge/plugins/Label/deluge/plugins/label/data/label_pref.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="2.24"/>
+  <requires lib="gtk+" version="3.0"/>
   <!-- interface-naming-policy toplevel-contextual -->
   <object class="GtkWindow" id="window1">
     <property name="can_focus">False</property>
diff --git a/deluge/plugins/Label/deluge/plugins/label/gtkui/__init__.py b/deluge/plugins/Label/deluge/plugins/label/gtkui/__init__.py
index 7d205b0fe..eeaeadcc8 100644
--- a/deluge/plugins/Label/deluge/plugins/label/gtkui/__init__.py
+++ b/deluge/plugins/Label/deluge/plugins/label/gtkui/__init__.py
@@ -12,7 +12,7 @@ from __future__ import unicode_literals
 import logging
 
 from deluge import component  # for systray
-from deluge.plugins.pluginbase import GtkPluginBase
+from deluge.plugins.pluginbase import Gtk3PluginBase
 
 from . import label_config, sidebar_menu, submenu
 
@@ -25,7 +25,7 @@ def cell_data_label(column, cell, model, row, data):
     cell.set_property('text', str(model.get_value(row, data)))
 
 
-class GtkUI(GtkPluginBase):
+class GtkUI(Gtk3PluginBase):
     def start(self):
         if self.label_menu:
             self.label_menu.on_show()
diff --git a/deluge/plugins/Label/deluge/plugins/label/gtkui/label_config.py b/deluge/plugins/Label/deluge/plugins/label/gtkui/label_config.py
index 507be5afa..b1bf56de6 100644
--- a/deluge/plugins/Label/deluge/plugins/label/gtkui/label_config.py
+++ b/deluge/plugins/Label/deluge/plugins/label/gtkui/label_config.py
@@ -11,7 +11,7 @@ from __future__ import unicode_literals
 
 import logging
 
-from gtk import Builder
+from gi.repository.Gtk import Builder
 
 from deluge.ui.client import client
 
diff --git a/deluge/plugins/Label/deluge/plugins/label/gtkui/sidebar_menu.py b/deluge/plugins/Label/deluge/plugins/label/gtkui/sidebar_menu.py
index 04df45ae0..1fb9ce39c 100644
--- a/deluge/plugins/Label/deluge/plugins/label/gtkui/sidebar_menu.py
+++ b/deluge/plugins/Label/deluge/plugins/label/gtkui/sidebar_menu.py
@@ -12,11 +12,18 @@ from __future__ import unicode_literals
 
 import logging
 
-import gtk
+import gi  # isort:skip (Required before Gtk import).
 
+gi.require_version('Gtk', '3.0')  # NOQA: E402
+
+# isort:imports-thirdparty
+from gi.repository import Gtk
+
+# isort:imports-firstparty
 import deluge.component as component
 from deluge.ui.client import client
 
+# isort:imports-localfolder
 from ..common import get_resource
 
 log = logging.getLogger(__name__)
@@ -33,12 +40,12 @@ class LabelSidebarMenu(object):
         self.items = []
 
         # add items, in reverse order, because they are prepended.
-        sep = gtk.SeparatorMenuItem()
+        sep = Gtk.SeparatorMenuItem()
         self.items.append(sep)
         self.menu.prepend(sep)
-        self._add_item('options', _('Label _Options'), gtk.STOCK_PREFERENCES)
-        self._add_item('remove', _('_Remove Label'), gtk.STOCK_REMOVE)
-        self._add_item('add', _('_Add Label'), gtk.STOCK_ADD)
+        self._add_item('options', _('Label _Options'), Gtk.STOCK_PREFERENCES)
+        self._add_item('remove', _('_Remove Label'), Gtk.STOCK_REMOVE)
+        self._add_item('add', _('_Add Label'), Gtk.STOCK_ADD)
 
         self.menu.show_all()
         # dialogs:
@@ -52,7 +59,7 @@ class LabelSidebarMenu(object):
         id is automatically-added as self.item_<id>
         """
         func = getattr(self, 'on_%s' % item_id)
-        item = gtk.ImageMenuItem(stock)
+        item = Gtk.ImageMenuItem(stock)
         item.get_children()[0].set_label(label)
         item.connect('activate', func)
         self.menu.prepend(item)
@@ -106,7 +113,7 @@ class AddDialog(object):
         pass
 
     def show(self):
-        self.builder = gtk.Builder()
+        self.builder = Gtk.Builder()
         self.builder.add_from_file(get_resource('label_add.ui'))
         self.dialog = self.builder.get_object('dlg_label_add')
         self.dialog.set_transient_for(component.get('MainWindow').window)
@@ -161,7 +168,7 @@ class OptionsDialog(object):
 
     def show(self, label):
         self.label = label
-        self.builder = gtk.Builder()
+        self.builder = Gtk.Builder()
         self.builder.add_from_file(get_resource('label_options.ui'))
         self.dialog = self.builder.get_object('dlg_label_options')
         self.dialog.set_transient_for(component.get('MainWindow').window)
diff --git a/deluge/plugins/Label/deluge/plugins/label/gtkui/submenu.py b/deluge/plugins/Label/deluge/plugins/label/gtkui/submenu.py
index fb0474f4d..b2df91fcd 100644
--- a/deluge/plugins/Label/deluge/plugins/label/gtkui/submenu.py
+++ b/deluge/plugins/Label/deluge/plugins/label/gtkui/submenu.py
@@ -12,7 +12,7 @@ from __future__ import unicode_literals
 
 import logging
 
-import gtk
+from gi.repository.Gtk import Menu, MenuItem
 
 from deluge import component  # for systray
 from deluge.ui.client import client
@@ -29,11 +29,11 @@ NO_LABEL = _('No Label')
 del _
 
 
-class LabelMenu(gtk.MenuItem):
+class LabelMenu(MenuItem):
     def __init__(self):
-        gtk.MenuItem.__init__(self, _('Label'))
+        MenuItem.__init__(self, _('Label'))
 
-        self.sub_menu = gtk.Menu()
+        self.sub_menu = Menu()
         self.set_submenu(self.sub_menu)
         self.items = []
 
@@ -52,9 +52,9 @@ class LabelMenu(gtk.MenuItem):
             self.sub_menu.remove(child)
         for label in [NO_LABEL] + list(labels):
             if label == NO_LABEL:
-                item = gtk.MenuItem(_(NO_LABEL))
+                item = MenuItem(_(NO_LABEL))
             else:
-                item = gtk.MenuItem(label.replace('_', '__'))
+                item = MenuItem(label.replace('_', '__'))
             item.connect('activate', self.on_select_label, label)
             self.sub_menu.append(item)
         self.show_all()
diff --git a/deluge/plugins/Label/setup.py b/deluge/plugins/Label/setup.py
index c20705a69..a6907563b 100644
--- a/deluge/plugins/Label/setup.py
+++ b/deluge/plugins/Label/setup.py
@@ -12,7 +12,7 @@ from setuptools import find_packages, setup
 __plugin_name__ = 'Label'
 __author__ = 'Martijn Voncken'
 __author_email__ = 'mvoncken@gmail.com'
-__version__ = '0.2'
+__version__ = '0.3'
 __url__ = 'http://deluge-torrent.org'
 __license__ = 'GPLv3'
 __description__ = 'Allows labels to be assigned to torrents'
@@ -38,7 +38,7 @@ setup(
     entry_points="""
     [deluge.plugin.core]
     %s = deluge.plugins.%s:CorePlugin
-    [deluge.plugin.gtkui]
+    [deluge.plugin.gtk3ui]
     %s = deluge.plugins.%s:GtkUIPlugin
     [deluge.plugin.web]
     %s = deluge.plugins.%s:WebUIPlugin
diff --git a/deluge/plugins/Notifications/deluge/plugins/notifications/gtkui.py b/deluge/plugins/Notifications/deluge/plugins/notifications/gtkui.py
index f61649dbe..ad6931a6a 100644
--- a/deluge/plugins/Notifications/deluge/plugins/notifications/gtkui.py
+++ b/deluge/plugins/Notifications/deluge/plugins/notifications/gtkui.py
@@ -23,7 +23,7 @@ from twisted.internet import defer
 import deluge.common
 import deluge.component as component
 import deluge.configmanager
-from deluge.plugins.pluginbase import GtkPluginBase
+from deluge.plugins.pluginbase import Gtk3PluginBase
 from deluge.ui.client import client
 
 from .common import CustomNotifications, get_resource
@@ -245,9 +245,9 @@ class GtkUiNotifications(CustomNotifications):
         return title, message
 
 
-class GtkUI(GtkPluginBase, GtkUiNotifications):
+class GtkUI(Gtk3PluginBase, GtkUiNotifications):
     def __init__(self, plugin_name):
-        GtkPluginBase.__init__(self, plugin_name)
+        Gtk3PluginBase.__init__(self, plugin_name)
         GtkUiNotifications.__init__(self)
 
     def enable(self):
diff --git a/deluge/plugins/Notifications/setup.py b/deluge/plugins/Notifications/setup.py
index b24178047..c96999c98 100755
--- a/deluge/plugins/Notifications/setup.py
+++ b/deluge/plugins/Notifications/setup.py
@@ -17,7 +17,7 @@ from setuptools import find_packages, setup
 __plugin_name__ = 'Notifications'
 __author__ = 'Pedro Algarvio'
 __author_email__ = 'pedro@algarvio.me'
-__version__ = '0.2'
+__version__ = '0.3'
 __url__ = 'http://dev.deluge-torrent.org/'
 __license__ = 'GPLv3'
 __description__ = 'Plugin which provides notifications to Deluge.'
@@ -46,7 +46,7 @@ setup(
     entry_points="""
     [deluge.plugin.core]
     %s = deluge.plugins.%s:CorePlugin
-    [deluge.plugin.gtkui]
+    [deluge.plugin.gtk3ui]
     %s = deluge.plugins.%s:GtkUIPlugin
     [deluge.plugin.web]
     %s = deluge.plugins.%s:WebUIPlugin
diff --git a/deluge/plugins/Scheduler/deluge/plugins/scheduler/gtkui.py b/deluge/plugins/Scheduler/deluge/plugins/scheduler/gtkui.py
index 2525a5f9e..8aa68b345 100644
--- a/deluge/plugins/Scheduler/deluge/plugins/scheduler/gtkui.py
+++ b/deluge/plugins/Scheduler/deluge/plugins/scheduler/gtkui.py
@@ -18,7 +18,7 @@ import logging
 import gtk
 
 import deluge.component as component
-from deluge.plugins.pluginbase import GtkPluginBase
+from deluge.plugins.pluginbase import Gtk3PluginBase
 from deluge.ui.client import client
 
 from .common import get_resource
@@ -167,7 +167,7 @@ class SchedulerSelectWidget(gtk.DrawingArea):
         self.hover_point = [-1, -1]
 
 
-class GtkUI(GtkPluginBase):
+class GtkUI(Gtk3PluginBase):
     def enable(self):
         self.create_prefs_page()
 
diff --git a/deluge/plugins/Scheduler/setup.py b/deluge/plugins/Scheduler/setup.py
index 16fadd067..4d62051fe 100644
--- a/deluge/plugins/Scheduler/setup.py
+++ b/deluge/plugins/Scheduler/setup.py
@@ -16,7 +16,7 @@ from setuptools import find_packages, setup
 __plugin_name__ = 'Scheduler'
 __author__ = 'Andrew Resch'
 __author_email__ = 'andrewresch@gmail.com'
-__version__ = '0.2'
+__version__ = '0.3'
 __url__ = 'http://deluge-torrent.org'
 __license__ = 'GPLv3'
 __description__ = 'Schedule limits on a per-hour per-day basis.'
@@ -38,7 +38,7 @@ setup(
     entry_points="""
     [deluge.plugin.core]
     %s = deluge.plugins.%s:CorePlugin
-    [deluge.plugin.gtkui]
+    [deluge.plugin.gtk3ui]
     %s = deluge.plugins.%s:GtkUIPlugin
     [deluge.plugin.web]
     %s = deluge.plugins.%s:WebUIPlugin
diff --git a/deluge/plugins/Stats/deluge/plugins/stats/data/config.ui b/deluge/plugins/Stats/deluge/plugins/stats/data/config.ui
index 68958c15a..25fc029db 100644
--- a/deluge/plugins/Stats/deluge/plugins/stats/data/config.ui
+++ b/deluge/plugins/Stats/deluge/plugins/stats/data/config.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="2.24"/>
+  <requires lib="gtk+" version="3.0"/>
   <!-- interface-naming-policy toplevel-contextual -->
   <object class="GtkWindow" id="window1">
     <property name="can_focus">False</property>
@@ -28,7 +28,6 @@
                     <property name="column_spacing">15</property>
                     <child>
                       <object class="GtkColorButton" id="bandwidth_graph_download_rate_color">
-                        <property name="use_action_appearance">False</property>
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
                         <property name="receives_default">True</property>
@@ -68,7 +67,6 @@
                     </child>
                     <child>
                       <object class="GtkColorButton" id="bandwidth_graph_upload_rate_color">
-                        <property name="use_action_appearance">False</property>
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
                         <property name="receives_default">True</property>
@@ -110,7 +108,6 @@
                     </child>
                     <child>
                       <object class="GtkColorButton" id="connections_graph_dht_nodes_color">
-                        <property name="use_action_appearance">False</property>
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
                         <property name="receives_default">True</property>
@@ -138,7 +135,6 @@
                     </child>
                     <child>
                       <object class="GtkColorButton" id="connections_graph_dht_cache_nodes_color">
-                        <property name="use_action_appearance">False</property>
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
                         <property name="receives_default">True</property>
@@ -190,7 +186,6 @@
                     </child>
                     <child>
                       <object class="GtkColorButton" id="connections_graph_dht_torrents_color">
-                        <property name="use_action_appearance">False</property>
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
                         <property name="receives_default">True</property>
@@ -206,7 +201,6 @@
                     </child>
                     <child>
                       <object class="GtkColorButton" id="connections_graph_num_connections_color">
-                        <property name="use_action_appearance">False</property>
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
                         <property name="receives_default">True</property>
@@ -236,7 +230,6 @@
                     </child>
                     <child>
                       <object class="GtkColorButton" id="seeds_graph_num_peers_color">
-                        <property name="use_action_appearance">False</property>
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
                         <property name="receives_default">True</property>
diff --git a/deluge/plugins/Stats/deluge/plugins/stats/graph.py b/deluge/plugins/Stats/deluge/plugins/stats/graph.py
index d0d1e83c6..847c253d1 100644
--- a/deluge/plugins/Stats/deluge/plugins/stats/graph.py
+++ b/deluge/plugins/Stats/deluge/plugins/stats/graph.py
@@ -20,7 +20,7 @@ import logging
 import math
 import time
 
-import cairo
+from gi.repository import cairo
 
 log = logging.getLogger(__name__)
 
diff --git a/deluge/plugins/Stats/deluge/plugins/stats/gtkui.py b/deluge/plugins/Stats/deluge/plugins/stats/gtkui.py
index f7083773e..75e30150e 100644
--- a/deluge/plugins/Stats/deluge/plugins/stats/gtkui.py
+++ b/deluge/plugins/Stats/deluge/plugins/stats/gtkui.py
@@ -16,34 +16,39 @@ from __future__ import division, unicode_literals
 
 import logging
 
-import gtk
+from gi.repository import Gtk
+from gi.repository.Gdk import RGBA
 
 import deluge
 from deluge import component
 from deluge.common import fspeed
-from deluge.plugins.pluginbase import GtkPluginBase
+from deluge.plugins.pluginbase import Gtk3PluginBase
 from deluge.ui.client import client
-from deluge.ui.gtkui.torrentdetails import Tab
+from deluge.ui.gtk3.torrentdetails import Tab
 
 from .common import get_resource
 from .graph import Graph, size_formatter_scale
 
 log = logging.getLogger(__name__)
 
+# Gdk.RGBA textual spec
+RED = 'rgb(255,0,0)'
+GREEN = 'rgb(0,128,0)'
+BLUE = 'rgb(0,0,255)'
+DARKRED = 'rgb(139,0,0)'
+ORANGE = 'rgb(255,165,0)'
+
 DEFAULT_CONF = {
-    'version': 1,
+    'version': 2,
     'colors': {
-        'bandwidth_graph': {
-            'upload_rate': str(gtk.gdk.Color('blue')),
-            'download_rate': str(gtk.gdk.Color('green')),
-        },
+        'bandwidth_graph': {'upload_rate': BLUE, 'download_rate': GREEN},
         'connections_graph': {
-            'dht_nodes': str(gtk.gdk.Color('orange')),
-            'dht_cache_nodes': str(gtk.gdk.Color('blue')),
-            'dht_torrents': str(gtk.gdk.Color('green')),
-            'num_connections': str(gtk.gdk.Color('darkred')),
+            'dht_nodes': ORANGE,
+            'dht_cache_nodes': BLUE,
+            'dht_torrents': GREEN,
+            'num_connections': DARKRED,
         },
-        'seeds_graph': {'num_peers': str(gtk.gdk.Color('blue'))},
+        'seeds_graph': {'num_peers': BLUE},
     },
 }
 
@@ -71,20 +76,18 @@ def fspeed_shortform(value):
     return fspeed(value, shortform=True)
 
 
-def gtk_to_graph_color(color):
-    """Turns a gtk.gdk.Color into a tuple with range 0-1 as used by the graph"""
-    gtk_color = gtk.gdk.Color(color)
-    red = gtk_color.red / 65535
-    green = gtk_color.green / 65535
-    blue = gtk_color.blue / 65535
-    return (red, green, blue)
+def text_to_rgba(color):
+    """Turns a Color into a tuple with range 0-1 as used by the graph"""
+    color_rgba = RGBA()
+    color_rgba.parse(color)
+    return color_rgba
 
 
 class GraphsTab(Tab):
     def __init__(self, colors):
         super(GraphsTab, self).__init__()
 
-        builder = gtk.Builder()
+        builder = Gtk.Builder()
         builder.add_from_file(get_resource('tabs.ui'))
         self.window = builder.get_object('graph_tab')
         self.notebook = builder.get_object('graph_notebook')
@@ -97,13 +100,13 @@ class GraphsTab(Tab):
         self.colors = colors
 
         self.bandwidth_graph = builder.get_object('bandwidth_graph')
-        self.bandwidth_graph.connect('expose_event', self.graph_expose)
+        self.bandwidth_graph.connect('draw', self.on_graph_draw)
 
         self.connections_graph = builder.get_object('connections_graph')
-        self.connections_graph.connect('expose_event', self.graph_expose)
+        self.connections_graph.connect('draw', self.on_graph_draw)
 
         self.seeds_graph = builder.get_object('seeds_graph')
-        self.seeds_graph.connect('expose_event', self.graph_expose)
+        self.seeds_graph.connect('draw', self.on_graph_draw)
 
         self.notebook.connect('switch-page', self._on_notebook_switch_page)
 
@@ -115,26 +118,20 @@ class GraphsTab(Tab):
 
         self.intervals = None
         self.intervals_combo = builder.get_object('combo_intervals')
-        cell = gtk.CellRendererText()
+        cell = Gtk.CellRendererText()
         self.intervals_combo.pack_start(cell, True)
         self.intervals_combo.set_cell_data_func(cell, neat_time)
         self.intervals_combo.connect('changed', self._on_selected_interval_changed)
         self.update_intervals()
 
-    def graph_expose(self, widget, event):
-        context = self.graph_widget.window.cairo_create()
-        # set a clip region
-        context.rectangle(
-            event.area.x, event.area.y, event.area.width, event.area.height
-        )
-        context.clip()
+    def on_graph_draw(self, widget, context):
         self.graph.draw_to_context(
             context,
-            self.graph_widget.allocation.width,
-            self.graph_widget.allocation.height,
+            self.graph_widget.get_allocated_width(),
+            self.graph_widget.get_allocated_height(),
         )
         # Do not propagate the event
-        return False
+        return True
 
     def update(self):
         d1 = client.stats.get_stats(list(self.graph.stat_info), self.selected_interval)
@@ -161,12 +158,12 @@ class GraphsTab(Tab):
         self.graph.add_stat(
             'download_rate',
             label='Download Rate',
-            color=gtk_to_graph_color(colors['download_rate']),
+            color=text_to_rgba(colors['download_rate']),
         )
         self.graph.add_stat(
             'upload_rate',
             label='Upload Rate',
-            color=gtk_to_graph_color(colors['upload_rate']),
+            color=text_to_rgba(colors['upload_rate']),
         )
         self.graph.set_left_axis(
             formatter=fspeed_shortform, min=10240, formatter_scale=size_formatter_scale
@@ -178,14 +175,10 @@ class GraphsTab(Tab):
         g = Graph()
         self.graph = g
         colors = self.colors['connections_graph']
-        g.add_stat('dht_nodes', color=gtk_to_graph_color(colors['dht_nodes']))
-        g.add_stat(
-            'dht_cache_nodes', color=gtk_to_graph_color(colors['dht_cache_nodes'])
-        )
-        g.add_stat('dht_torrents', color=gtk_to_graph_color(colors['dht_torrents']))
-        g.add_stat(
-            'num_connections', color=gtk_to_graph_color(colors['num_connections'])
-        )
+        g.add_stat('dht_nodes', color=text_to_rgba(colors['dht_nodes']))
+        g.add_stat('dht_cache_nodes', color=text_to_rgba(colors['dht_cache_nodes']))
+        g.add_stat('dht_torrents', color=text_to_rgba(colors['dht_torrents']))
+        g.add_stat('num_connections', color=text_to_rgba(colors['num_connections']))
         g.set_left_axis(formatter=int_str, min=10)
 
     def select_seeds_graph(self):
@@ -193,7 +186,7 @@ class GraphsTab(Tab):
         self.graph_widget = self.seeds_graph
         self.graph = Graph()
         colors = self.colors['seeds_graph']
-        self.graph.add_stat('num_peers', color=gtk_to_graph_color(colors['num_peers']))
+        self.graph.add_stat('num_peers', color=text_to_rgba(colors['num_peers']))
         self.graph.set_left_axis(formatter=int_str, min=10)
 
     def set_colors(self, colors):
@@ -204,7 +197,7 @@ class GraphsTab(Tab):
         )
 
     def _on_intervals_changed(self, intervals):
-        liststore = gtk.ListStore(int)
+        liststore = Gtk.ListStore(int)
         for inter in intervals:
             liststore.append([inter])
         self.intervals_combo.set_model(liststore)
@@ -236,14 +229,14 @@ class GraphsTab(Tab):
         return True
 
 
-class GtkUI(GtkPluginBase):
+class GtkUI(Gtk3PluginBase):
     def enable(self):
         log.debug('Stats plugin enable called')
         self.config = deluge.configmanager.ConfigManager(
-            'stats.gtkui.conf', DEFAULT_CONF
+            'stats.gtk3ui.conf', DEFAULT_CONF
         )
 
-        self.builder = gtk.Builder()
+        self.builder = Gtk.Builder()
         self.builder.add_from_file(get_resource('config.ui'))
 
         component.get('Preferences').add_page(
@@ -277,9 +270,9 @@ class GtkUI(GtkPluginBase):
         for graph, colors in self.config['colors'].items():
             gtkconf[graph] = {}
             for value, color in colors.items():
+                color_btn = self.builder.get_object('%s_%s_color' % (graph, value))
                 try:
-                    color_btn = self.builder.get_object('%s_%s_color' % (graph, value))
-                    gtkconf[graph][value] = str(color_btn.get_color())
+                    gtkconf[graph][value] = color_btn.get_color().to_string()
                 except Exception:
                     gtkconf[graph][value] = DEFAULT_CONF['colors'][graph][value]
         self.config['colors'] = gtkconf
@@ -293,9 +286,9 @@ class GtkUI(GtkPluginBase):
             for value, color in colors.items():
                 try:
                     color_btn = self.builder.get_object('%s_%s_color' % (graph, value))
-                    color_btn.set_color(gtk.gdk.Color(color))
-                except Exception:
-                    log.debug('Unable to set %s %s %s', graph, value, color)
+                    color_btn.set_rgba(text_to_rgba(color))
+                except Exception as ex:
+                    log.debug('Unable to set %s %s %s: %s', graph, value, color, ex)
         client.stats.get_config().addCallback(self.cb_get_config)
 
     def cb_get_config(self, config):
diff --git a/deluge/plugins/Stats/setup.py b/deluge/plugins/Stats/setup.py
index a3eeb9769..65d36941e 100644
--- a/deluge/plugins/Stats/setup.py
+++ b/deluge/plugins/Stats/setup.py
@@ -17,7 +17,7 @@ from setuptools import find_packages, setup
 __plugin_name__ = 'Stats'
 __author__ = 'Ian Martin'
 __author_email__ = 'ianmartin@cantab.net'
-__version__ = '0.3.2'
+__version__ = '0.4'
 __url__ = 'http://deluge-torrent.org'
 __license__ = 'GPLv3'
 __description__ = 'Display stats graphs'
@@ -42,7 +42,7 @@ setup(
     entry_points="""
     [deluge.plugin.core]
     %s = deluge.plugins.%s:CorePlugin
-    [deluge.plugin.gtkui]
+    [deluge.plugin.gtk3ui]
     %s = deluge.plugins.%s:GtkUIPlugin
     [deluge.plugin.web]
     %s = deluge.plugins.%s:WebUIPlugin
diff --git a/deluge/plugins/Toggle/deluge/plugins/toggle/gtkui.py b/deluge/plugins/Toggle/deluge/plugins/toggle/gtkui.py
index 1be3faef7..c54bca46f 100644
--- a/deluge/plugins/Toggle/deluge/plugins/toggle/gtkui.py
+++ b/deluge/plugins/Toggle/deluge/plugins/toggle/gtkui.py
@@ -17,13 +17,13 @@ from __future__ import unicode_literals
 import logging
 
 import deluge.component as component
-from deluge.plugins.pluginbase import GtkPluginBase
+from deluge.plugins.pluginbase import Gtk3PluginBase
 from deluge.ui.client import client
 
 log = logging.getLogger(__name__)
 
 
-class GtkUI(GtkPluginBase):
+class GtkUI(Gtk3PluginBase):
     def enable(self):
         self.core = client.toggle
         self.plugin = component.get('PluginManager')
diff --git a/deluge/plugins/Toggle/setup.py b/deluge/plugins/Toggle/setup.py
index 3dcf83f4d..54d9ee228 100644
--- a/deluge/plugins/Toggle/setup.py
+++ b/deluge/plugins/Toggle/setup.py
@@ -17,7 +17,7 @@ from setuptools import find_packages, setup
 __plugin_name__ = 'Toggle'
 __author__ = 'John Garland'
 __author_email__ = 'johnnybg+deluge@gmail.com'
-__version__ = '0.3'
+__version__ = '0.4'
 __url__ = 'http://deluge-torrent.org'
 __license__ = 'GPLv3'
 __description__ = 'Toggles the session'
@@ -39,7 +39,7 @@ setup(
     entry_points="""
     [deluge.plugin.core]
     %s = deluge.plugins.%s:CorePlugin
-    [deluge.plugin.gtkui]
+    [deluge.plugin.gtk3ui]
     %s = deluge.plugins.%s:GtkUIPlugin
     [deluge.plugin.web]
     %s = deluge.plugins.%s:WebUIPlugin
diff --git a/deluge/plugins/WebUi/deluge/plugins/webui/data/config.ui b/deluge/plugins/WebUi/deluge/plugins/webui/data/config.ui
index 04b73ecdf..101f60d0c 100644
--- a/deluge/plugins/WebUi/deluge/plugins/webui/data/config.ui
+++ b/deluge/plugins/WebUi/deluge/plugins/webui/data/config.ui
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
-  <requires lib="gtk+" version="2.24"/>
+  <requires lib="gtk+" version="3.0"/>
   <!-- interface-naming-policy toplevel-contextual -->
   <object class="GtkAdjustment" id="adjustment1">
     <property name="upper">99999</property>
diff --git a/deluge/plugins/WebUi/deluge/plugins/webui/gtkui.py b/deluge/plugins/WebUi/deluge/plugins/webui/gtkui.py
index f72769868..3697a1d00 100644
--- a/deluge/plugins/WebUi/deluge/plugins/webui/gtkui.py
+++ b/deluge/plugins/WebUi/deluge/plugins/webui/gtkui.py
@@ -15,10 +15,10 @@ from __future__ import unicode_literals
 
 import logging
 
-import gtk
+from gi.repository import Gtk
 
 import deluge.component as component
-from deluge.plugins.pluginbase import GtkPluginBase
+from deluge.plugins.pluginbase import Gtk3PluginBase
 from deluge.ui.client import client
 
 from .common import get_resource
@@ -26,9 +26,9 @@ from .common import get_resource
 log = logging.getLogger(__name__)
 
 
-class GtkUI(GtkPluginBase):
+class GtkUI(Gtk3PluginBase):
     def enable(self):
-        self.builder = gtk.Builder()
+        self.builder = Gtk.Builder()
         self.builder.add_from_file(get_resource('config.ui'))
 
         component.get('Preferences').add_page(
@@ -80,14 +80,14 @@ class GtkUI(GtkPluginBase):
 
         vbox = self.builder.get_object('prefs_box')
 
-        hbox = gtk.HBox()
-        icon = gtk.image_new_from_stock(
-            gtk.STOCK_DIALOG_ERROR, gtk.ICON_SIZE_SMALL_TOOLBAR
+        hbox = Gtk.HBox()
+        icon = Gtk.image_new_from_stock(
+            Gtk.STOCK_DIALOG_ERROR, Gtk.IconSize.SMALL_TOOLBAR
         )
         icon.set_padding(5, 5)
-        hbox.pack_start(icon, False, False)
+        hbox.pack_start(icon, False, False, 0)
 
-        label = gtk.Label(
+        label = Gtk.Label(
             _(
                 'The Deluge web interface is not installed, '
                 'please install the\ninterface and try again'
@@ -95,7 +95,7 @@ class GtkUI(GtkPluginBase):
         )
         label.set_alignment(0, 0.5)
         label.set_padding(5, 5)
-        hbox.pack_start(label)
+        hbox.pack_start(label, False, False, 0)
 
         vbox.pack_start(hbox, False, False, 10)
         vbox.reorder_child(hbox, 0)
diff --git a/deluge/plugins/WebUi/setup.py b/deluge/plugins/WebUi/setup.py
index 646467882..3c110c8ed 100644
--- a/deluge/plugins/WebUi/setup.py
+++ b/deluge/plugins/WebUi/setup.py
@@ -16,7 +16,7 @@ from setuptools import find_packages, setup
 __plugin_name__ = 'WebUi'
 __author__ = 'Damien Churchill'
 __author_email__ = 'damoxc@gmail.com'
-__version__ = '0.1'
+__version__ = '0.2'
 __url__ = 'http://deluge-torrent.org'
 __license__ = 'GPLv3'
 __description__ = 'Allows starting the web interface within the daemon.'
@@ -38,7 +38,7 @@ setup(
     entry_points="""
     [deluge.plugin.core]
     %s = deluge.plugins.%s:CorePlugin
-    [deluge.plugin.gtkui]
+    [deluge.plugin.gtk3ui]
     %s = deluge.plugins.%s:GtkUIPlugin
     """
     % ((__plugin_name__, __plugin_name__.lower()) * 2),
diff --git a/deluge/plugins/pluginbase.py b/deluge/plugins/pluginbase.py
index 4ae268d68..a17ae2d81 100644
--- a/deluge/plugins/pluginbase.py
+++ b/deluge/plugins/pluginbase.py
@@ -47,16 +47,16 @@ class CorePluginBase(PluginBase):
         super(CorePluginBase, self).disable()
 
 
-class GtkPluginBase(PluginBase):
+class Gtk3PluginBase(PluginBase):
     def __init__(self, plugin_name):
-        super(GtkPluginBase, self).__init__('GtkPlugin.' + plugin_name)
-        log.debug('GtkPlugin initialized..')
+        super(Gtk3PluginBase, self).__init__('Gtk3Plugin.' + plugin_name)
+        log.debug('Gtk3Plugin initialized..')
 
     def enable(self):
-        super(GtkPluginBase, self).enable()
+        super(Gtk3PluginBase, self).enable()
 
     def disable(self):
-        super(GtkPluginBase, self).disable()
+        super(Gtk3PluginBase, self).disable()
 
 
 class WebPluginBase(PluginBase):
diff --git a/deluge/ui/gtk3/pluginmanager.py b/deluge/ui/gtk3/pluginmanager.py
index 75a62f825..d60f8d390 100644
--- a/deluge/ui/gtk3/pluginmanager.py
+++ b/deluge/ui/gtk3/pluginmanager.py
@@ -24,7 +24,7 @@ class PluginManager(deluge.pluginmanagerbase.PluginManagerBase, component.Compon
         component.Component.__init__(self, 'PluginManager')
         self.config = ConfigManager('gtk3ui.conf')
         deluge.pluginmanagerbase.PluginManagerBase.__init__(
-            self, 'gtk3ui.conf', 'deluge.plugin.gtk3'
+            self, 'gtk3ui.conf', 'deluge.plugin.gtk3ui'
         )
 
         self.hooks = {'on_apply_prefs': [], 'on_show_prefs': []}