diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 2fc8dac6..41c998a6 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -14,7 +14,7 @@ jobs:
         python-version: [3.11]
     services:
       postgres:
-        image: postgres:12
+        image: postgres:15
         env:
           POSTGRES_USER: postgres
           POSTGRES_PASSWORD: postgres
diff --git a/docker-compose.yml b/docker-compose.yml
index 68addb7d..ca360fdb 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -2,7 +2,7 @@ version: '3'
 
 services:
   db:
-    image: postgres:12.3
+    image: postgres:15.13
     environment:
       - POSTGRES_HOST_AUTH_METHOD=trust
       - POSTGRES_DB=djangosnippets
diff --git a/ratings/tests/tests.py b/ratings/tests/tests.py
index fd7e700b..84bf8e8d 100644
--- a/ratings/tests/tests.py
+++ b/ratings/tests/tests.py
@@ -264,9 +264,7 @@ def test_order_postgresql(self):
         self.assertEqual(list(rated_qs), [self.item3, self.item1])
 
         # check that the model method results are what we expect
-        self.assertQuerysetEqual(
-            rated_qs, self.rated_model.ratings.order_by_rating(queryset=item13_qs), transform=lambda x: x
-        )
+        self.assertSequenceEqual(list(rated_qs), list(self.rated_model.ratings.order_by_rating(queryset=item13_qs)))
 
         # check that the scores are correct
         self.assertEqual(rated_qs[0].score, None)
diff --git a/requirements/base.txt b/requirements/base.txt
index 0c69d26c..5615045a 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -1,5 +1,5 @@
 bleach==6.2.0
-Django==5.0.14
+Django==5.1.11
 dj-database-url==0.5.0
 django-allauth==0.63.6
 django-contrib-comments==2.2.0