diff --git a/requirements.txt b/requirements.txt
index e24adf7..98bb35a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ Jinja2==2.10
 jsonschema==2.6.0
 MarkupSafe==1.0
 matplotlib==2.1.2
-mistune==0.8.3
+mistune==2.0.3
 nbconvert==5.3.1
 nbformat==4.4.0
 numpy==1.14.0