diff --git a/requirements.txt b/requirements.txt
index 2b5340c..1ca9cd1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -82,7 +82,7 @@ MarkupSafe==1.0
 matplotlib==3.2.1
 mccabe==0.6.1
 mechanize==0.4.5
-mistune==0.8.4
+mistune==2.0.3
 msgpack==0.6.2
 nbconvert==5.6.1
 nbformat==5.0.6