diff --git a/requirements.txt b/requirements.txt
index 8ca0b63..10a6bb7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ jsonschema==3.0.1
 lxml==4.3.4
 Mako==1.0.11
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 mongoengine==0.17.0
 mysqlclient==1.4.2
 packaging==19.0