diff --git a/cas/middleware.py b/cas/middleware.py
index 771a1d1..e46a27b 100644
--- a/cas/middleware.py
+++ b/cas/middleware.py
@@ -5,6 +5,15 @@
 except ImportError:
     from urllib.parse import urlencode
 
+
+MIDDLEWARE_BASE = None
+
+try:
+    from django.utils.deprecation import MiddlewareMixin
+    MIDDLEWARE_BASE = MiddlewareMixin
+except ImportError:
+    MIDDLEWARE_BASE = object
+
 from django.conf import settings
 from django.contrib.auth import REDIRECT_FIELD_NAME
 from django.contrib.auth import logout as do_logout
@@ -19,7 +28,7 @@
 __all__ = ['CASMiddleware']
 
 
-class CASMiddleware(object):
+class CASMiddleware(MIDDLEWARE_BASE):
     """
     Middleware that allows CAS authentication on admin pages
     """
@@ -81,7 +90,7 @@ def process_exception(self, request, exception):
             return None
 
 
-class ProxyMiddleware(object):
+class ProxyMiddleware(MIDDLEWARE_BASE):
 
     # Middleware used to "fake" the django app that it lives at the Proxy Domain
     def process_request(self, request):