diff --git a/requirements.txt b/requirements.txt
index 9e90d54..19a62d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ lxml==3.5.0
 MarkupSafe==0.23
 matplotlib==2.0.2
 mccabe==0.6.1
-mistune==0.7.4
+mistune==2.0.3
 more-itertools==2.2
 nbconvert==5.2.1
 nbformat==4.4.0