diff --git a/requirements.txt b/requirements.txt
index b7f5cb2..6c9c5b3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,7 +46,7 @@ kiwisolver==1.2.0
 Markdown==3.2.2
 MarkupSafe==1.1.1
 matplotlib==3.2.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.1
 nbdime==2.0.0
 nbformat==5.0.6