diff --git a/oauth2_provider/oauth2_backends.py b/oauth2_provider/oauth2_backends.py
index f04463d2d..accd9d3f8 100644
--- a/oauth2_provider/oauth2_backends.py
+++ b/oauth2_provider/oauth2_backends.py
@@ -1,11 +1,11 @@
 import json
 from urllib.parse import urlparse, urlunparse
 
+from django.http import HttpRequest
 from oauthlib import oauth2
 from oauthlib.common import Request as OauthlibRequest
 from oauthlib.common import quote, urlencode, urlencoded
 from oauthlib.oauth2 import OAuth2Error
-from django.http import HttpRequest
 
 from .exceptions import FatalClientError, OAuthToolkitError
 from .settings import oauth2_settings