diff --git a/scrapy/http/response/__init__.py b/scrapy/http/response/__init__.py
index 09c4e725a..983154001 100644
--- a/scrapy/http/response/__init__.py
+++ b/scrapy/http/response/__init__.py
@@ -4,7 +4,6 @@ responses in Scrapy.
 
 See documentation in docs/topics/request-response.rst
 """
-import six
 from six.moves.urllib.parse import urljoin
 
 from scrapy.http.headers import Headers