diff --git a/requirements.txt b/requirements.txt
index 69aa03545..783be1e62 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,6 +16,7 @@ pyflakes>=0.8.1
 pyquery>1.2.4
 python-dateutil>=2.2
 python-magic>=0.4.6
+python-memcached>=1.48		# for django.core.cache.backends.memcached
 pytz>=2014.7
 setuptools>=1.2
 six>=1.8.0