diff --git a/requirements.txt b/requirements.txt
index 4d63a57..551ca20 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ lxml==4.5.0
 Markdown==3.2.1
 MarkupSafe==1.1.1
 matplotlib==3.2.1
-mistune==0.8.4
+mistune==2.0.3
 mpld3==0.3
 nbconvert==5.6.1
 nbformat==5.0.5