diff --git a/setup.cfg b/setup.cfg
index 1f845967..b9e8dd57 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -37,6 +37,7 @@ dogpile.cache =
 dogpile =
   python-memcached>=1.56 # PSF
   pymemcache>=3.5.0 # Apache-2.0
+  python-binary-memcached>=0.29.0 # MIT
 mongo =
   pymongo!=3.1,>=3.0.2 # Apache-2.0
 etcd3gw =