diff --git a/avatar/admin.py b/avatar/admin.py
index a47f74b..0025f24 100644
--- a/avatar/admin.py
+++ b/avatar/admin.py
@@ -4,7 +4,7 @@ try:
     from django.utils import six
 except ImportError:
     import six
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.template.loader import render_to_string
 
 from avatar.models import Avatar
diff --git a/avatar/apps.py b/avatar/apps.py
new file mode 100644
index 0000000..dcff8cd
--- /dev/null
+++ b/avatar/apps.py
@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class Config(AppConfig):
+    name = 'avatar'
+    default_auto_field = 'django.db.models.AutoField'
diff --git a/avatar/forms.py b/avatar/forms.py
index 9fa9f0b..7c0b204 100644
--- a/avatar/forms.py
+++ b/avatar/forms.py
@@ -9,7 +9,7 @@ try:
     from django.utils import six
 except ImportError:
     import six
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from django.template.defaultfilters import filesizeformat
 
 from avatar.conf import settings
diff --git a/avatar/models.py b/avatar/models.py
index 1e2ab04..cd0c8b3 100644
--- a/avatar/models.py
+++ b/avatar/models.py
@@ -9,8 +9,8 @@ from django.core.files import File
 from django.core.files.base import ContentFile
 from django.core.files.storage import get_storage_class
 from django.utils.module_loading import import_string
-from django.utils.translation import ugettext_lazy as _
-from django.utils.encoding import force_text
+from django.utils.translation import gettext_lazy as _
+from django.utils.encoding import force_str
 from django.db.models import signals
 
 from avatar.conf import settings
@@ -39,7 +39,7 @@ def avatar_path_handler(instance=None, filename=None, size=None, ext=None):
     if settings.AVATAR_EXPOSE_USERNAMES:
         tmppath.append(get_username(instance.user))
     else:
-        tmppath.append(force_text(instance.user.pk))
+        tmppath.append(force_str(instance.user.pk))
     if not filename:
         # Filename already stored in database
         filename = instance.avatar.name
diff --git a/avatar/signals.py b/avatar/signals.py
index 080910e..9074a91 100644
--- a/avatar/signals.py
+++ b/avatar/signals.py
@@ -1,5 +1,5 @@
 import django.dispatch
 
 
-avatar_updated = django.dispatch.Signal(providing_args=["user", "avatar"])
-avatar_deleted = django.dispatch.Signal(providing_args=["user", "avatar"])
+avatar_updated = django.dispatch.Signal()
+avatar_deleted = django.dispatch.Signal()
diff --git a/avatar/templatetags/avatar_tags.py b/avatar/templatetags/avatar_tags.py
index b8beb75..5ca0d35 100644
--- a/avatar/templatetags/avatar_tags.py
+++ b/avatar/templatetags/avatar_tags.py
@@ -10,7 +10,7 @@ try:
     from django.utils import six
 except ImportError:
     import six
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 from django.utils.module_loading import import_string
 
 from avatar.conf import settings
diff --git a/avatar/urls.py b/avatar/urls.py
index b031d60..379158e 100644
--- a/avatar/urls.py
+++ b/avatar/urls.py
@@ -1,12 +1,12 @@
-from django.conf.urls import url
+from django.urls import re_path
 
 from avatar import views
 
 urlpatterns = [
-    url(r'^add/$', views.add, name='avatar_add'),
-    url(r'^change/$', views.change, name='avatar_change'),
-    url(r'^delete/$', views.delete, name='avatar_delete'),
-    url(r'^render_primary/(?P<user>[\w\d\@\.\-_]+)/(?P<size>[\d]+)/$',
+    re_path(r'^add/$', views.add, name='avatar_add'),
+    re_path(r'^change/$', views.change, name='avatar_change'),
+    re_path(r'^delete/$', views.delete, name='avatar_delete'),
+    re_path(r'^render_primary/(?P<user>[\w\d\@\.\-_]+)/(?P<size>[\d]+)/$',
         views.render_primary,
         name='avatar_render_primary'),
 ]
diff --git a/avatar/views.py b/avatar/views.py
index 8221b2f..b8bf605 100644
--- a/avatar/views.py
+++ b/avatar/views.py
@@ -1,5 +1,5 @@
 from django.shortcuts import render, redirect
-from django.utils.translation import ugettext as _
+from django.utils.translation import gettext as _
 # Issue 182: six no longer included with Django 3.0
 try:
     from django.utils import six
diff --git a/setup.py b/setup.py
index 00a2abe..7fc17d3 100644
--- a/setup.py
+++ b/setup.py
@@ -35,6 +35,7 @@ setup(
         'Framework :: Django :: 2.1',
         'Framework :: Django :: 2.2',
         'Framework :: Django :: 3.0',
+        'Framework :: Django :: 4.0',
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
@@ -46,6 +47,7 @@ setup(
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
     keywords='avatar, django',
     author='Eric Florenzano',