diff --git a/requirements/requirements.in b/requirements/requirements.in
index 9bf1434eb8..8c2a27a31c 100644
--- a/requirements/requirements.in
+++ b/requirements/requirements.in
@@ -22,6 +22,7 @@ djangorestframework==3.7.7
 djangorestframework-yaml==1.0.3
 irc==16.2
 jsonschema==2.6.0
+Markdown==2.6.11    # used for formatting API help
 ordereddict==1.1
 pexpect==4.6.0
 psutil==5.4.3
diff --git a/requirements/requirements.txt b/requirements/requirements.txt
index ba78b239a1..0f5c419604 100644
--- a/requirements/requirements.txt
+++ b/requirements/requirements.txt
@@ -61,6 +61,7 @@ jsonpickle==0.9.6         # via asgi-amqp
 jsonschema==2.6.0
 kombu==4.2.1              # via asgi-amqp, celery
 lxml==4.2.3
+markdown==2.6.11
 more-itertools==4.1.0     # via irc, jaraco.functools, jaraco.itertools
 msgpack-python==0.5.5     # via asgi-amqp
 netaddr==0.7.19           # via pyrad