diff --git a/categories/urls.py b/categories/urls.py
index a6aa6fd..333c6b7 100644
--- a/categories/urls.py
+++ b/categories/urls.py
@@ -1,13 +1,23 @@
-from django.conf.urls.defaults import *
+from django.conf.urls import patterns, url
 from .models import Category
 
+try:
+    from django.views.generic import DetailView, ListView
+except ImportError:
+    try:
+        from cbv import DetailView, ListView
+    except ImportError:
+        from django.core.exceptions import ImproperlyConfigured
+        raise ImproperlyConfigured("For older versions of Django, you need django-cbv.")
+
+
 categorytree_dict = {
     'queryset': Category.objects.filter(level=0)
 }
 
-urlpatterns = patterns('django.views.generic.list_detail',
+urlpatterns = patterns('',
     url(
-        r'^$', 'object_list', categorytree_dict, name='categories_tree_list'
+        r'^$', ListView.as_view(**categorytree_dict), name='categories_tree_list'
     ),
 )
 
diff --git a/example/settings.py b/example/settings.py
index 012dab6..75900f9 100644
--- a/example/settings.py
+++ b/example/settings.py
@@ -123,7 +123,7 @@ CATEGORIES_SETTINGS = {
     },
 }
 
-if django.VERSION[1] == 4:
+if django.VERSION[1] >= 4:
     from settings14 import *
 if django.VERSION[1] == 3:
     from settings13 import *
diff --git a/example/urls.py b/example/urls.py
index c8e1a75..a15924d 100644
--- a/example/urls.py
+++ b/example/urls.py
@@ -1,4 +1,4 @@
-from django.conf.urls.defaults import *
+from django.conf.urls import patterns, include
 
 # Uncomment the next two lines to enable the admin:
 from django.contrib import admin
@@ -13,7 +13,7 @@ urlpatterns = patterns('',
     # Example:
     # (r'^sample/', include('sample.foo.urls')),
 
-    # Uncomment the admin/doc line below and add 'django.contrib.admindocs' 
+    # Uncomment the admin/doc line below and add 'django.contrib.admindocs'
     # to INSTALLED_APPS to enable admin documentation:
     # (r'^admin/doc/', include('django.contrib.admindocs.urls')),
 
@@ -32,4 +32,4 @@ urlpatterns = patterns('',
      (r'^static/(?P<path>.*)$', 'django.views.static.serve',
          {'document_root': os.path.join(ROOT_PATH, 'example', 'static')}),
 
-)
\ No newline at end of file
+)