diff --git a/requirements.txt b/requirements.txt
index e4b14b8..b9a3208 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -63,7 +63,7 @@ matplotlib==2.0.2
 mccabe==0.6.1
 mechanize==0.2.5
 meld==3.16.4
-mistune==0.7.4
+mistune==2.0.3
 mock==2.0.0
 nbconvert==5.2.1
 nbformat==4.3.0