diff --git a/requirements.txt b/requirements.txt
index a7afffa..4f421f2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==2.2.3
 mccabe==0.6.1
-mistune==0.8.3
+mistune==2.0.3
 more-itertools==4.3.0
 msgpack==0.5.6
 nbconvert==5.3.1