diff --git a/notifications/__init__.py b/notifications/__init__.py
index b7599fd..de17f66 100644
--- a/notifications/__init__.py
+++ b/notifications/__init__.py
@@ -9,5 +9,3 @@
 
 # PEP 386-compliant version number: N.N[.N]+[{a|b|c|rc}N[.N]+][.postN][.devN]
 __version__ = "1.8.0"
-
-default_app_config = "notifications.apps.Config"  # pylint: disable=invalid-name
diff --git a/notifications/migrations/0008_index_together_recipient_unread.py b/notifications/migrations/0008_index_together_recipient_unread.py
index ae8eeab..ece6708 100644
--- a/notifications/migrations/0008_index_together_recipient_unread.py
+++ b/notifications/migrations/0008_index_together_recipient_unread.py
@@ -2,6 +2,24 @@
 
 from django.conf import settings
 from django.db import migrations
+from django.db.models import Index
+from django.utils import version
+
+_version = version.get_version_tuple(version.get_version())
+if _version[0] >= 4 and _version[1] >= 2:
+    _operations = [
+        migrations.AddIndex(
+            model_name="notification",
+            index=Index(fields=("recipient", "unread"), name="recipient_unread_idx"),
+        ),
+    ]
+else:
+    _operations = [
+        migrations.AlterIndexTogether(
+            name="notification",
+            index_together={("recipient", "unread")},
+        ),
+    ]
 
 
 class Migration(migrations.Migration):
@@ -10,9 +28,4 @@ class Migration(migrations.Migration):
         ("notifications", "0007_add_timestamp_index"),
     ]
 
-    operations = [
-        migrations.AlterIndexTogether(
-            name="notification",
-            index_together={("recipient", "unread")},
-        ),
-    ]
+    operations = _operations
diff --git a/notifications/migrations/0016_rename_notification_recipient_unread_notificatio_recipie_8bedf2_idx.py b/notifications/migrations/0016_rename_notification_recipient_unread_notificatio_recipie_8bedf2_idx.py
new file mode 100644
index 0000000..8243292
--- /dev/null
+++ b/notifications/migrations/0016_rename_notification_recipient_unread_notificatio_recipie_8bedf2_idx.py
@@ -0,0 +1,17 @@
+# Generated by Django 4.2.11 on 2024-05-03 00:08
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("notifications", "0015_alter_notification_action_object_content_type_and_more"),
+    ]
+
+    operations = [
+        migrations.RenameIndex(
+            model_name="notification",
+            new_name="notificatio_recipie_8bedf2_idx",
+            old_fields=("recipient", "unread"),
+        ),
+    ]
diff --git a/notifications/models/base.py b/notifications/models/base.py
index 18462b0..1895f3f 100644
--- a/notifications/models/base.py
+++ b/notifications/models/base.py
@@ -116,7 +116,7 @@ class AbstractNotification(models.Model):
         abstract = True
         ordering = ("-timestamp",)
         # speed up notifications count query
-        index_together = ("recipient", "unread")
+        indexes = [models.Index(fields=["recipient", "unread"])]
         verbose_name = _("Notification")
         verbose_name_plural = _("Notifications")
 
diff --git a/sample_website/sample_app/__init__.py b/sample_website/sample_app/__init__.py
index a45fddd..e69de29 100644
--- a/sample_website/sample_app/__init__.py
+++ b/sample_website/sample_app/__init__.py
@@ -1,3 +0,0 @@
-default_app_config = (  # pylint: disable=invalid-name
-    "notifications.tests.sample_notifications.apps.SampleNotificationsConfig"
-)