diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e0ebb0d..66c6ea7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: [3.7, 3.8, 3.9]
+        python: [3.8, 3.9, "3.10", "3.11"]
     steps:
       - uses: actions/checkout@v2
       - name: Setup Python ${{ matrix.python }}
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python: [3.9]
+        python: ["3.11"]
     steps:
       - uses: actions/checkout@v2
       - name: Setup Python ${{ matrix.python }}
@@ -33,7 +33,7 @@ jobs:
         with:
           python-version: ${{ matrix.python }}
       - name: Install flake8
-        run: pip install flake8
+        run: pip install flake8 flake8-print
       - name: Run flake8
         # Run tox using the version of Python in `PATH`
         # run: tox -e py${{ matrix.python }}-${{ matrix.django }}
diff --git a/filer_addons/filer_gui/admin/api.py b/filer_addons/filer_gui/admin/api.py
index 34eaac2..d75d2ea 100644
--- a/filer_addons/filer_gui/admin/api.py
+++ b/filer_addons/filer_gui/admin/api.py
@@ -1,6 +1,6 @@
 import django
 from django import forms
-from django.conf.urls import url
+from django.urls import re_path
 from django.contrib import admin
 # from django.core.urlresolvers import reverse
 from django.http.response import JsonResponse
@@ -74,12 +74,12 @@ class FilerGuiAdmin(admin.ModelAdmin):
 
     def get_urls(self):
         urls = [
-            url(
+            re_path(
                 r'^file-detail-json/$',
                 self.admin_site.admin_view(self.file_detail_json_view),
                 name='file_detail_json_for_id'
             ),
-            url(
+            re_path(
                 r'^file-upload/$',
                 self.admin_site.admin_view(self.file_upload_view),
                 name='file_upload'
diff --git a/filer_addons/filer_gui/admin/upload_inline.py b/filer_addons/filer_gui/admin/upload_inline.py
index eeb381f..ad55005 100644
--- a/filer_addons/filer_gui/admin/upload_inline.py
+++ b/filer_addons/filer_gui/admin/upload_inline.py
@@ -7,7 +7,7 @@
 from django.contrib import admin
 from django.core.exceptions import ImproperlyConfigured
 from django.forms import widgets
-from django.utils.encoding import force_text
+from django.utils.encoding import force_str
 from django.utils.html import mark_safe
 from django.utils.translation import gettext_lazy as _
 
@@ -81,7 +81,7 @@ def html_data_fields(self):
             'file_field': self.get_file_field(),
             'file_type': self.get_file_type(),
             'messages': {
-                'generic_upload_error': force_text(_('Upload error')),
+                'generic_upload_error': force_str(_('Upload error')),
             },
         }
         data_fields = '{} data-uploadinline=\'{}\''.format(
diff --git a/filer_addons/filer_gui/change_list/templates/admin/filer/folder/directory_table.html b/filer_addons/filer_gui/change_list/templates/admin/filer/folder/directory_table.html
index 2ec6c8c..28b7325 100644
--- a/filer_addons/filer_gui/change_list/templates/admin/filer/folder/directory_table.html
+++ b/filer_addons/filer_gui/change_list/templates/admin/filer/folder/directory_table.html
@@ -139,7 +139,7 @@
                                 {{ file.owner|default:"n/a" }}
                             </td>
                             <td class="column-size">
-                                <span class="tiny"> ({{ file.size|filesize:"auto1000long" }}{% ifequal file.file_type "Image" %}, {{ file.width }}x{{ file.height }} px{% endifequal %})</span>
+                                <span class="tiny"> ({{ file.size|filesize:"auto1000long" }}{% if file.file_type == "Image" %}, {{ file.width }}x{{ file.height }} px{% endif %})</span>
                             </td>
                             <td class="column-action">
                                 <a href="{{ file.canonical_url }}"
diff --git a/filer_addons/filer_gui/models.py b/filer_addons/filer_gui/models.py
index 667caa0..7733adb 100644
--- a/filer_addons/filer_gui/models.py
+++ b/filer_addons/filer_gui/models.py
@@ -1,5 +1,3 @@
-from __future__ import unicode_literals
-
 from filer.models import File, Image
 
 
diff --git a/filer_addons/filer_utils/management/commands/subcommands/import_existing_files.py b/filer_addons/filer_utils/management/commands/subcommands/import_existing_files.py
index 5b37e7b..65e913d 100644
--- a/filer_addons/filer_utils/management/commands/subcommands/import_existing_files.py
+++ b/filer_addons/filer_utils/management/commands/subcommands/import_existing_files.py
@@ -36,7 +36,7 @@ def add_arguments(self, parser):
         )
 
     def handle(self, *args, **options):
-        print(File.objects.count())
+        self.stdout.write(File.objects.count())
         if not options.get('force', False) and File.objects.count():
             raise Exception('Must use --force, you have existing files in db!')
 
@@ -45,7 +45,7 @@ def handle(self, *args, **options):
         self.prefix_public = filer_settings.FILER_STORAGES['public']['main']['UPLOAD_TO_PREFIX']  # noqa
 
         def walk(absdir, reldir, db_folder):
-            print("walk %s" % db_folder)
+            self.stdout.write("walk %s" % db_folder)
             storage = self.storage_public
             child_dirs, files = storage.listdir(absdir)
             for filename in files:
diff --git a/filer_addons/filer_utils/management/commands/subcommands/resolve_duplicates.py b/filer_addons/filer_utils/management/commands/subcommands/resolve_duplicates.py
index 95a2c23..9f2c263 100644
--- a/filer_addons/filer_utils/management/commands/subcommands/resolve_duplicates.py
+++ b/filer_addons/filer_utils/management/commands/subcommands/resolve_duplicates.py
@@ -28,13 +28,13 @@ def resolve_for_class(self, cls):
             'sha1').order_by().filter(id__count__gt=1)
         # keep the oldes, that is probably longest in search indexes...
         duplicates = cls.objects.filter(sha1__in=temp).order_by('uploaded_at')
-        print("resolving duplicates in {}!".format(cls.__name__))
+        self.stdout.write("resolving duplicates in {}!".format(cls.__name__))
         # relation business
         model_links = [
             rel.get_accessor_name()
             for rel in model_get_all_related_objects(cls)
         ]
-        print(model_links)
+        self.stdout.write(model_links)
         # state
         done = {}
         count = 0
@@ -45,21 +45,21 @@ def resolve_for_class(self, cls):
                     relation = getattr(file, link, None)
                     if getattr(relation, 'all', None):
                         for usage_obj in relation.all():
-                            # print(relation.field.name)
-                            # print(usage_obj)
-                            # print(usage_obj.__class__)
-                            # print(usage_obj.id)
+                            # self.stdout.write(relation.field.name)
+                            # self.stdout.write(usage_obj)
+                            # self.stdout.write(usage_obj.__class__)
+                            # self.stdout.write(usage_obj.id)
                             setattr(usage_obj, relation.field.name,
                                     cls.objects.get(id=done[file.sha1]))
                             usage_obj.save()
                 # DELETE
-                print("delete {}".format(file.path))
+                self.stdout.write("delete {}".format(file.path))
                 file.delete()
                 count += 1
             else:
                 # first time, keep this file
                 done[file.sha1] = file.id
-        print("resolved {} duplicates in {}!".format(count, cls.__name__))
+        self.stdout.write("resolved {} duplicates in {}!".format(count, cls.__name__))
 
 
 def model_get_all_related_objects(model):
diff --git a/filer_addons/filer_utils/management/commands/subcommands/unused_files.py b/filer_addons/filer_utils/management/commands/subcommands/unused_files.py
index 607ef95..8bdb46a 100644
--- a/filer_addons/filer_utils/management/commands/subcommands/unused_files.py
+++ b/filer_addons/filer_utils/management/commands/subcommands/unused_files.py
@@ -1,4 +1,4 @@
-from django.utils.encoding import force_text
+from django.utils.encoding import force_str
 from filer.models import File, Folder, Image
 
 from .base import SubcommandsCommand
@@ -67,7 +67,7 @@ def unused_for_file_type(self, model_cls, **options):
         amount = unused.count()
         for file in unused:
             if options['verbose']:
-                self.stdout.write(force_text(file))
+                self.stdout.write(force_str(file))
             if options['delete']:
                 file.delete()
         self.stdout.write(
diff --git a/filer_addons/tests/testapp/urls.py b/filer_addons/tests/testapp/urls.py
index 0df563a..9a9a745 100644
--- a/filer_addons/tests/testapp/urls.py
+++ b/filer_addons/tests/testapp/urls.py
@@ -1,5 +1,5 @@
 from django.conf import settings
-from django.conf.urls import url
+from django.urls import re_path
 from django.contrib import admin
 from django.conf.urls.static import static
 
@@ -8,7 +8,7 @@
 
 
 urlpatterns = [
-    url(
+    re_path(
         r'^admin/',
         admin.site.urls
     ),
diff --git a/tox.ini b/tox.ini
index a0047a7..505fc11 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,12 +1,16 @@
 
 [tox]
-envlist = py{37,38,39}-django{32}-filer{20x,21x}-django-polymorphic{new}, py{37,38,39}-django{22}-filer{16x}-django-polymorphic{old}
+envlist =
+    py{38,39,310,311}-django{42}-filer{22x}-django-polymorphic{new}
+    py{38,39,310,311}-django{32}-filer{20x,21x}-django-polymorphic{new}
+    py{38,39,310}-django{22}-filer{16x}-django-polymorphic{old}
 
 [gh-actions]
 python =
-    3.7: py37
     3.8: py38
     3.9: py39
+    3.10: py310
+    3.11: py311
 
 [testenv]
 commands = python manage.py test
@@ -17,10 +21,14 @@ deps =
     django-polymorphic-old: django-polymorphic==2.0.1
     django-polymorphic-new: django-polymorphic
     coverage
+    reportlab
+    svglib
     django-coverage
     filer142: django-filer==1.4.2
     filer16x: django-filer<1.7
     filer20x: django-filer<2.1
     filer21x: django-filer<2.2
+    filer22x: django-filer<2.3
     django22: django>=2.2,<3.0
     django32: django>=3.2,<4.0
+    django42: django>=4.2,<5.0