diff --git a/doc/requirements.txt b/doc/requirements.txt
index 350a4e39..b583248e 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -10,3 +10,4 @@ eventlet
 anyjson==0.3.1
 Flask==0.9
 sphinxcontrib-httpdomain
+pymongo==2.2.1