diff --git a/requirements.txt b/requirements.txt
index 4360121..6ef91b9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -76,7 +76,7 @@ lxml==4.1.1
 MarkupSafe==1.0
 matplotlib==2.1.0
 mccabe==0.6.1
-mistune==0.8.1
+mistune==2.0.3
 mpmath==1.0.0
 msgpack-python==0.4.8
 multipledispatch==0.4.9