diff -up ocrfeeder-0.8.5/src/ocrfeeder/studio/boxesarea.py.pygtk ocrfeeder-0.8.5/src/ocrfeeder/studio/boxesarea.py
--- ocrfeeder-0.8.5/src/ocrfeeder/studio/boxesarea.py.pygtk	2020-01-22 23:26:35.000000000 +0100
+++ ocrfeeder-0.8.5/src/ocrfeeder/studio/boxesarea.py	2022-10-23 18:19:06.352485106 +0200
@@ -16,6 +16,9 @@
 #    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 ###########################################################################
 
+import gi
+gi.require_version('Gtk', '3.0')
+gi.require_version('GooCanvas', '2.0')
 from gi.repository import Gtk, Gdk, GooCanvas, GObject, GdkPixbuf
 
 class BoxesArea(GooCanvas.Canvas):
diff -up ocrfeeder-0.8.5/src/ocrfeeder/studio/pagesiconview.py.pygtk ocrfeeder-0.8.5/src/ocrfeeder/studio/pagesiconview.py
--- ocrfeeder-0.8.5/src/ocrfeeder/studio/pagesiconview.py.pygtk	2020-01-22 23:26:35.000000000 +0100
+++ ocrfeeder-0.8.5/src/ocrfeeder/studio/pagesiconview.py	2022-10-23 18:19:06.352485106 +0200
@@ -18,6 +18,8 @@
 
 import os
 import gettext
+import gi
+gi.require_version('Gtk', '3.0')
 from gi.repository import Gtk, Gdk, GdkPixbuf, Pango
 _ = gettext.gettext
 
diff -up ocrfeeder-0.8.5/src/ocrfeeder/studio/widgetModeler.py.pygtk ocrfeeder-0.8.5/src/ocrfeeder/studio/widgetModeler.py
--- ocrfeeder-0.8.5/src/ocrfeeder/studio/widgetModeler.py.pygtk	2020-01-22 23:26:35.000000000 +0100
+++ ocrfeeder-0.8.5/src/ocrfeeder/studio/widgetModeler.py	2022-10-23 18:19:06.352485106 +0200
@@ -33,6 +33,8 @@ from .widgetPresenter import BoxEditor,
     PageSizeDialog, UnpaperDialog, \
     QueuedEventsProgressDialog, SpellCheckerDialog
 import gettext
+import gi
+gi.require_version('Gtk', '3.0')
 from gi.repository import Gtk, GObject, Gdk, GdkPixbuf, Pango
 import math
 import os.path
diff -up ocrfeeder-0.8.5/src/ocrfeeder/studio/widgetPresenter.py.pygtk ocrfeeder-0.8.5/src/ocrfeeder/studio/widgetPresenter.py
--- ocrfeeder-0.8.5/src/ocrfeeder/studio/widgetPresenter.py.pygtk	2022-03-15 17:39:31.000000000 +0100
+++ ocrfeeder-0.8.5/src/ocrfeeder/studio/widgetPresenter.py	2022-10-23 18:19:06.354799946 +0200
@@ -28,6 +28,10 @@ from ocrfeeder.util.graphics import conv
 from enchant.checker import SpellChecker
 from PIL import Image
 import gettext
+import gi
+gi.require_version('Gtk', '3.0')
+gi.require_version('GtkSpell', '3.0')
+gi.require_version('GooCanvas', '2.0')
 from gi.repository import Gtk, GooCanvas, Gdk, GObject, GLib, GdkPixbuf, GtkSpell
 import os.path
 import signal
diff -up ocrfeeder-0.8.5/src/ocrfeeder/util/lib.py.pygtk ocrfeeder-0.8.5/src/ocrfeeder/util/lib.py
--- ocrfeeder-0.8.5/src/ocrfeeder/util/lib.py.pygtk	2022-10-23 18:19:06.354799946 +0200
+++ ocrfeeder-0.8.5/src/ocrfeeder/util/lib.py	2022-10-23 18:19:24.012399856 +0200
@@ -27,6 +27,8 @@ import tempfile
 import xml.etree.ElementTree as etree
 
 import sane
+import gi
+gi.require_version('Gtk', '3.0')
 from gi.repository import Gtk
 from PIL import Image