diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 63a014a..3987bef 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -35,14 +35,14 @@ jobs:
             django: "4.2"
           - python: "3.13"
             django: "4.2"
-          - python: "3.12"
-            django: "5.1"
-          - python: "3.13"
-            django: "5.1"
           - python: "3.12"
             django: "5.2"
           - python: "3.13"
             django: "5.2"
+          - python: "3.12"
+            django: "6.0"
+          - python: "3.13"
+            django: "6.0"
 
     steps:
       - uses: actions/checkout@v5
diff --git a/docs/releasenotes.md b/docs/releasenotes.md
index c426bf5..42b8379 100644
--- a/docs/releasenotes.md
+++ b/docs/releasenotes.md
@@ -1,5 +1,13 @@
 # Release Notes
 
+## Unreleased
+
+### What's new?
+
+- Added support for Django 6.0
+- Removed obsolete Django version checks
+
+
 ## 5.1.0
 
 ### What's new?
diff --git a/flags/__init__.py b/flags/__init__.py
index ac01bc1..e69de29 100644
--- a/flags/__init__.py
+++ b/flags/__init__.py
@@ -1,5 +0,0 @@
-import django
-
-
-if django.VERSION < (3, 2):
-    default_app_config = "flags.apps.DjangoFlagsConfig"
diff --git a/flags/migrations/0014_flagstate_unique_constraint.py b/flags/migrations/0014_flagstate_unique_constraint.py
new file mode 100644
index 0000000..62e4d7b
--- /dev/null
+++ b/flags/migrations/0014_flagstate_unique_constraint.py
@@ -0,0 +1,24 @@
+# Generated by Django 6.0.2 on 2026-02-10 15:23
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("flags", "0013_add_required_field"),
+    ]
+
+    operations = [
+        migrations.AlterUniqueTogether(
+            name="flagstate",
+            unique_together=set(),
+        ),
+        migrations.AddConstraint(
+            model_name="flagstate",
+            constraint=models.UniqueConstraint(
+                fields=("name", "condition", "value"),
+                name="flags_flagstate_unique_name_condition_value",
+            ),
+        ),
+    ]
diff --git a/flags/models.py b/flags/models.py
index 9d6448b..a29da13 100644
--- a/flags/models.py
+++ b/flags/models.py
@@ -9,7 +9,12 @@ class FlagState(models.Model):
 
     class Meta:
         app_label = "flags"
-        unique_together = ("name", "condition", "value")
+        constraints = [
+            models.UniqueConstraint(
+                fields=["name", "condition", "value"],
+                name="flags_flagstate_unique_name_condition_value",
+            )
+        ]
 
     def __str__(self):
         return (
diff --git a/flags/tests/test_conditions_validators.py b/flags/tests/test_conditions_validators.py
index 3e0db48..ed9c782 100644
--- a/flags/tests/test_conditions_validators.py
+++ b/flags/tests/test_conditions_validators.py
@@ -1,4 +1,3 @@
-import django
 from django.contrib.auth import get_user_model
 from django.core.exceptions import ValidationError
 from django.test import TestCase, override_settings
@@ -89,13 +88,6 @@ def test_invalid_date_strings(self):
         with self.assertRaises(ValidationError):
             validate_date("tomorrowish")
 
-        # Django 4.0 relies on Python 3.7+'s `datetime.fromisoformat()`, which
-        # handles this where the old regex did not. This is now valid when on
-        # Django 4.0+. See https://github.com/django/django/pull/14582
-        if django.VERSION < (4, 0):
-            with self.assertRaises(ValidationError):
-                validate_date("2020-04-01")
-
     def test_valid_date_strings(self):
         validate_date("2020-04-01T12:00")
         validate_date("2020-04-01T12:00+04:00")
diff --git a/flags/tests/testapp/__init__.py b/flags/tests/testapp/__init__.py
index 2e8a831..e69de29 100644
--- a/flags/tests/testapp/__init__.py
+++ b/flags/tests/testapp/__init__.py
@@ -1,5 +0,0 @@
-import django
-
-
-if django.VERSION < (3, 2):
-    default_app_config = "flags.tests.testapp.apps.TestAppConfig"
diff --git a/pyproject.toml b/pyproject.toml
index 5e9f810..f67dc68 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -20,6 +20,7 @@ classifiers = [
     "Framework :: Django :: 4.2",
     "Framework :: Django :: 5.1",
     "Framework :: Django :: 5.2",
+    "Framework :: Django :: 6.0",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3.10",
diff --git a/tox.ini b/tox.ini
index e4e16e2..6783305 100644
--- a/tox.ini
+++ b/tox.ini
@@ -3,7 +3,8 @@ skipsdist=True
 envlist=
     lint,
     python{3.10,3.13}-django4.2
-    python{3.12,3.13}-django{5.1,5.2}
+    python{3.12,3.13}-django5.2
+    python{3.12,3.13}-django6.0
     coverage
 
 [testenv]
@@ -20,8 +21,8 @@ basepython=
 
 deps=
     django4.2: Django~=4.2
-    django5.1: Django~=5.1
     django5.2: Django~=5.2
+    django6.0: Django~=6.0
 
 [testenv:lint]
 basepython=python3.13