diff --git a/requirements.txt b/requirements.txt
index d8222121..6ad64ad6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,3 +19,4 @@ djmail>=0.4
 django-jinja>=0.21
 jinja2==2.7.1
 pygments>=1.6
+django-sites==0.4