diff --git a/rtd-requirements.txt b/rtd-requirements.txt
index c968ac1..2df634c 100644
--- a/rtd-requirements.txt
+++ b/rtd-requirements.txt
@@ -22,3 +22,4 @@ PasteDeploy
 influxdb==2.4.0
 python-surveilclient==0.6.0
 six
+mongoengine