diff --git a/master/requirements.txt b/master/requirements.txt
index 5ca388e..1b1479e 100644
--- a/master/requirements.txt
+++ b/master/requirements.txt
@@ -44,7 +44,7 @@ jsonpickle==0.9.5
 jsonschema==2.6.0
 MarkupSafe==0.23
 mccabe==0.6.1
-mistune==0.8.3
+mistune==2.0.3
 more-itertools==4.2.0
 msgpack-numpy==0.4.1
 msgpack-python==0.4.8