diff --git a/debexpo/accounts/apps.py b/debexpo/accounts/apps.py
index 383c3e76396ff071046f1c6179d1c1fff84660e7..47313a2853b8054dfd083435a125cb17c82ee693 100644
--- a/debexpo/accounts/apps.py
+++ b/debexpo/accounts/apps.py
@@ -30,4 +30,4 @@ from django.apps import AppConfig
 
 
 class AccountsConfig(AppConfig):
-    name = 'accounts'
+    name = 'debexpo.accounts'
diff --git a/debexpo/base/apps.py b/debexpo/base/apps.py
index 466c3da355a0ac5c43f00dbf3887d27a54eeb514..abe1fba7c875c0093bf7df4439cb394d26837660 100644
--- a/debexpo/base/apps.py
+++ b/debexpo/base/apps.py
@@ -30,4 +30,4 @@ from django.apps import AppConfig
 
 
 class BaseConfig(AppConfig):
-    name = 'base'
+    name = 'debexpo.base'
diff --git a/debexpo/bugs/apps.py b/debexpo/bugs/apps.py
index 8024aebf76f910994f9407f10b5ecad1587b6792..a36bc29e68145b11cb13356e586e2148346f9275 100644
--- a/debexpo/bugs/apps.py
+++ b/debexpo/bugs/apps.py
@@ -30,4 +30,4 @@ from django.apps import AppConfig
 
 
 class BugsConfig(AppConfig):
-    name = 'bugs'
+    name = 'debexpo.bugs'
diff --git a/debexpo/comments/apps.py b/debexpo/comments/apps.py
index 23b3934a5910a8563f70870e3a9fa4029317bb21..a795e699779d20987c8845584b050f47e305a0a7 100644
--- a/debexpo/comments/apps.py
+++ b/debexpo/comments/apps.py
@@ -30,4 +30,4 @@ from django.apps import AppConfig
 
 
 class CommentsConfig(AppConfig):
-    name = 'comments'
+    name = 'debexpo.comments'
diff --git a/debexpo/importer/apps.py b/debexpo/importer/apps.py
index 4b1300e7942cddbe1e9e7ed30eb17118c7c1b526..cd947e8e160ba1454696577ea8fc755dd21febe4 100644
--- a/debexpo/importer/apps.py
+++ b/debexpo/importer/apps.py
@@ -30,4 +30,4 @@ from django.apps import AppConfig
 
 
 class ImporterConfig(AppConfig):
-    name = 'importer'
+    name = 'debexpo.importer'
diff --git a/debexpo/importer/tasks.py b/debexpo/importer/tasks.py
index 444aef243c2bc9a9a26cccc72a303cb1d6e8e124..8a9da789a27c0deb14392eb8e4d51549c1d648a6 100644
--- a/debexpo/importer/tasks.py
+++ b/debexpo/importer/tasks.py
@@ -26,7 +26,7 @@
 #   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 #   OTHER DEALINGS IN THE SOFTWARE.
 
-from celery.decorators import task
+from celery import shared_task
 
 from django.conf import settings
 
@@ -34,7 +34,7 @@ from debexpo.importer.models import Importer
 from debexpo.tools.cache import enforce_unique_instance
 
 
-@task
+@shared_task
 def importer():
     with enforce_unique_instance('importer'):
         importctl = Importer(settings.UPLOAD_SPOOL)
diff --git a/debexpo/keyring/apps.py b/debexpo/keyring/apps.py
index f7757a0924e6fe40110d27bb8e8aa05ff4403689..6c769d142834d3d737742f60b8849268fb126d8d 100644
--- a/debexpo/keyring/apps.py
+++ b/debexpo/keyring/apps.py
@@ -30,4 +30,4 @@ from django.apps import AppConfig
 
 
 class KeyringConfig(AppConfig):
-    name = 'keyring'
+    name = 'debexpo.keyring'
diff --git a/debexpo/keyring/migrations/0004_set_ecc_size_to_zero.py b/debexpo/keyring/migrations/0004_set_ecc_size_to_zero.py
new file mode 100644
index 0000000000000000000000000000000000000000..1017178b17f9b0175827ec9014d1c12e740e237c
--- /dev/null
+++ b/debexpo/keyring/migrations/0004_set_ecc_size_to_zero.py
@@ -0,0 +1,59 @@
+#   0004_set_ecc_size_to_zero.py - Set ECC minimum size to zero
+#
+#   This file is part of debexpo
+#   https://salsa.debian.org/mentors.debian.net-team/debexpo
+#
+#   Copyright © 2021 Baptiste Beauplat <lyknode@debian.org>
+#
+#   Permission is hereby granted, free of charge, to any person
+#   obtaining a copy of this software and associated documentation
+#   files (the "Software"), to deal in the Software without
+#   restriction, including without limitation the rights to use,
+#   copy, modify, merge, publish, distribute, sublicense, and/or sell
+#   copies of the Software, and to permit persons to whom the
+#   Software is furnished to do so, subject to the following
+#   conditions:
+#
+#   The above copyright notice and this permission notice shall be
+#   included in all copies or substantial portions of the Software.
+#
+#   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+#   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+#   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+#   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+#   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+#   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+#   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+#   OTHER DEALINGS IN THE SOFTWARE.
+
+from django.db import migrations
+
+
+def set_ecc_size_to_zero(apps, schema_editor):
+    set_ecc_size(apps, schema_editor, 0)
+
+
+def revert_set_ecc_size_to_zero(apps, schema_editor):  # pragma: no cover
+    set_ecc_size(apps, schema_editor, 256)
+
+
+def set_ecc_size(apps, schema_editor, size):
+    GPGAlgo = apps.get_model('keyring', 'GPGAlgo')
+
+    algo = GPGAlgo.objects.get(name='ed25519')
+    algo.minimal_size_requirement = size
+    algo.full_clean()
+    algo.save()
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('keyring', '0003_fingerprint_uniqueness',),
+    ]
+
+    operations = [
+        migrations.RunPython(set_ecc_size_to_zero, revert_set_ecc_size_to_zero),
+    ]
diff --git a/debexpo/nntp/apps.py b/debexpo/nntp/apps.py
index a2d9e8bf00d9ba365ca2ec6a77fee7f01968e382..56ddb3e85f5fd0048b1c19ef7a22a69dd97314d7 100644
--- a/debexpo/nntp/apps.py
+++ b/debexpo/nntp/apps.py
@@ -29,4 +29,4 @@ from django.apps import AppConfig
 
 
 class NntpConfig(AppConfig):
-    name = 'nntp'
+    name = 'debexpo.nntp'
diff --git a/debexpo/packages/apps.py b/debexpo/packages/apps.py
index 2d566080b9f89222d9ed745c4e4cdbc5b8e9cff7..85ef34272565c654137326404a0caa41b301040e 100644
--- a/debexpo/packages/apps.py
+++ b/debexpo/packages/apps.py
@@ -29,4 +29,4 @@ from django.apps import AppConfig
 
 
 class PackagesConfig(AppConfig):
-    name = 'packages'
+    name = 'debexpo.packages'
diff --git a/debexpo/packages/tasks.py b/debexpo/packages/tasks.py
index 77d33694f926967fb6395e6a7b39cf0870ef28ea..1c3239c9b380d9190fbc8d34f853b60fcb6fc779 100644
--- a/debexpo/packages/tasks.py
+++ b/debexpo/packages/tasks.py
@@ -27,7 +27,7 @@
 #   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 #   OTHER DEALINGS IN THE SOFTWARE.
 
-from celery.decorators import task
+from celery import shared_task
 from datetime import timedelta, datetime, timezone
 from logging import getLogger
 from debian.deb822 import Changes
@@ -97,7 +97,7 @@ def remove_uploads(uploads):
     return removals
 
 
-@task
+@shared_task
 def remove_old_uploads():
     expiration_date = datetime.now(timezone.utc) - \
         timedelta(weeks=settings.MAX_AGE_UPLOAD_WEEKS)
@@ -128,7 +128,7 @@ def notify_uploaders(removals, reason):
                    reason=reason)
 
 
-@task
+@shared_task
 def remove_uploaded_packages(client=None):
     uploads_to_archive = set()
     uploads_to_new = set()
diff --git a/debexpo/plugins/apps.py b/debexpo/plugins/apps.py
index 2b78aee6a14a03bc971d242d47e209f53b882618..4a35b1a51856c3828c770c80174fac3bf795ddf6 100644
--- a/debexpo/plugins/apps.py
+++ b/debexpo/plugins/apps.py
@@ -30,4 +30,4 @@ from django.apps import AppConfig
 
 
 class PluginsConfig(AppConfig):
-    name = 'plugins'
+    name = 'debexpo.plugins'
diff --git a/debexpo/repository/apps.py b/debexpo/repository/apps.py
index 6959e71c06ba5a5406a5ae6fa1b60cde6e38f1b1..1180470707e1af4d799a694f431eccc83f47cd10 100644
--- a/debexpo/repository/apps.py
+++ b/debexpo/repository/apps.py
@@ -30,4 +30,4 @@ from django.apps import AppConfig
 
 
 class RepositoryConfig(AppConfig):
-    name = 'repository'
+    name = 'debexpo.repository'
diff --git a/debexpo/settings/common.py b/debexpo/settings/common.py
index 874975bc135697c212e47b23fa889402f568b0e9..a7e79204e683b4eb795efba717df213f2c29e05f 100644
--- a/debexpo/settings/common.py
+++ b/debexpo/settings/common.py
@@ -260,3 +260,6 @@ REGISTRATION_CACHE_TIMEOUT = 1 * 24 * 3600
 # Timeout for processes (10 minutes by default, 30 minutes for lintian)
 SUBPROCESS_TIMEOUT = 10 * 60
 SUBPROCESS_TIMEOUT_LINTIAN = 30 * 60
+
+# Default settings for models
+DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'
diff --git a/debexpo/tools/token.py b/debexpo/tools/token.py
index 72f8e493068ae1d2646e0def89b80635ba32b499..de02cb9bd91d0a75b8881e4c31ba8c8e1b85b9c5 100644
--- a/debexpo/tools/token.py
+++ b/debexpo/tools/token.py
@@ -26,6 +26,7 @@
 #   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 #   OTHER DEALINGS IN THE SOFTWARE.
 
+from datetime import date
 
 from django.conf import settings
 from django.utils.crypto import constant_time_compare, salted_hmac
@@ -87,5 +88,12 @@ class EmailChangeTokenGenerator(PasswordResetTokenGenerator):
             str(login_timestamp) + \
             str(timestamp)
 
+    def _num_days(self, dt):
+        return (dt - date(2001, 1, 1)).days
+
+    def _today(self):
+        # Used for mocking in tests
+        return date.today()  # pragma: no cover
+
 
 email_change_token_generator = EmailChangeTokenGenerator()
diff --git a/setup.py b/setup.py
index c13decdce2643a160f8b69ef6d47dff03f820ebe..5f8ce0114cb039834e2e2d48a47633a299fa8074 100644
--- a/setup.py
+++ b/setup.py
@@ -77,13 +77,13 @@ setup(
 
     # Requirements
     install_requires=[
-        'django >= 2.2.10, < 3',
+        'django >= 2.2.10, < 4',
         'bcrypt >= 3.1.6, < 4',
         'python-debian >= 0.1.35, < 1',
         'celery >= 4.2.1, < 6',
         'django-celery-beat >= 1.1.1, < 3',
         'redis >= 3.2.1, < 4',
-        'django-redis >= 4.10.0, < 5',
+        'django-redis >= 4.10.0, < 6',
         'python-debianbts >= 2.8.2, < 4',
         'lxml >= 4.3.2, < 5',
         'dulwich >= 0.19.11, < 1',
diff --git a/tests/functional/accounts/test_reset.py b/tests/functional/accounts/test_reset.py
index 1dbf2cf9cf78c2d3fb9641e4b3ab8005e45418b5..0f779e11a8471585c0c6f1dd560348551a981090 100644
--- a/tests/functional/accounts/test_reset.py
+++ b/tests/functional/accounts/test_reset.py
@@ -27,8 +27,7 @@
 #   OTHER DEALINGS IN THE SOFTWARE.
 
 from django.contrib.auth.tokens import PasswordResetTokenGenerator
-from django.contrib.auth.views import INTERNAL_RESET_URL_TOKEN, \
-    INTERNAL_RESET_SESSION_TOKEN
+from django.contrib.auth.views import INTERNAL_RESET_SESSION_TOKEN
 from django.core import mail
 from django.urls import reverse
 from django.utils.encoding import force_bytes
@@ -67,7 +66,7 @@ class TestResetController(TestController):
 
         response = self.client.post(reverse('password_reset_confirm', kwargs={
             'uidb64': uid,
-            'token': INTERNAL_RESET_URL_TOKEN
+            'token': 'set-password'
         }), {
             'new_password1': 'newpass',
             'new_password2': 'newpass',
diff --git a/tox.ini b/tox.ini
index aa76e1b57d43fe5d7d0eda76e4d6c738e3bbe49d..7b30496e4960d94231e4c590c5f96a608cd59be5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -4,21 +4,23 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py3-django2,flake8
+envlist = py3-django{2,3},flake8
 
 [testenv]
 extras = testing
 
 deps = coverage
+    django2: Django >= 2.2.24, < 3
+    django3: Django >= 3.2.7, <4
 
 setenv =
     DJANGO_SETTINGS_MODULE=debexpo.settings.test
 
 commands =
     coverage erase
-    coverage run manage.py test -v 2
-    coverage report --include='debexpo*'
-    coverage html --include='debexpo*'
+    coverage run manage.py test -v 2 --exclude-tag nntp {posargs}
+    coverage report --include='debexpo*' --omit '*/nntp.py'
+    coverage html --include='debexpo*' --omit '*/nntp.py'
 
 [testenv:flake8]
 deps = flake8