diff --git a/requirements.txt b/requirements.txt
index 89e0423..d409904 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -71,7 +71,7 @@ Mako==1.0.9
 MarkupSafe==1.1.1
 marshmallow==2.19.2
 marshmallow-sqlalchemy==0.15.0
-mistune==0.8.4
+mistune==2.0.3
 multipledispatch==0.6.0
 netaddr==0.7.19
 networkx==2.2