diff --git a/rest_framework/serializers.py b/rest_framework/serializers.py
index ad4c6084e..be9bfcebc 100644
--- a/rest_framework/serializers.py
+++ b/rest_framework/serializers.py
@@ -12,8 +12,8 @@ response content is handled by parsers and renderers.
 """
 from __future__ import unicode_literals
 
-import warnings
 import traceback
+import warnings
 
 from django.db import models
 from django.db.models.fields import Field as DjangoModelField