diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d92b6e3..0900344 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,7 +27,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, 3.11]
+        python-version: [3.9, 3.11]
         database: [sqlite, mysql, postgresql]
 
     services:
@@ -40,7 +40,7 @@ jobs:
         # needed because the container does not provide a healthcheck
         options: --health-cmd "mysqladmin ping" --health-interval 10s --health-timeout 5s --health-retries=5
       postgres:
-        image: postgres:12-alpine
+        image: postgres:15-alpine
         env:
           POSTGRES_USER: postgres
           POSTGRES_PASSWORD: postgres
diff --git a/Makefile b/Makefile
index 9fe513a..6843512 100644
--- a/Makefile
+++ b/Makefile
@@ -40,7 +40,7 @@ startpg:
 				   --health-interval 10s \
 				   --health-timeout 5s \
 				   --health-retries 5 \
-				   postgres:11-alpine
+				   postgres:15-alpine
 	until [ "`docker inspect -f {{.State.Health.Status}} ${TEST_CONTAINER}-pg`" == "healthy" ]; do sleep 0.1; done;
 
 testpg: startpg
diff --git a/dbcleanup/__init__.py b/dbcleanup/__init__.py
index a5134a8..ab14b34 100644
--- a/dbcleanup/__init__.py
+++ b/dbcleanup/__init__.py
@@ -1,4 +1,4 @@
-__version__ = '0.1.4'
+__version__ = '0.1.5'
 
 # set default_app_config when using django earlier than 3.2
 try:
diff --git a/setup.cfg b/setup.cfg
index ae0e9a0..5a7b6fa 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -26,7 +26,7 @@ zip_safe = False
 include_package_data = True
 packages = find:
 install_requires =
-    Django >= 3.0, < 5.0
+    Django >= 3.0, < 6.0
 python_requires = >=3.7
 
 [options.packages.find]
diff --git a/testapp/testapp/urls.py b/testapp/testapp/urls.py
index 8ab3632..ab2af97 100644
--- a/testapp/testapp/urls.py
+++ b/testapp/testapp/urls.py
@@ -13,9 +13,10 @@
     1. Import the include() function: from django.urls import include, path
     2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
 """
+
 from django.contrib import admin
 from django.urls import path
 
 urlpatterns = [
-    path('admin/', admin.site.urls),
+    path("admin/", admin.site.urls),
 ]