diff --git a/requirements.txt b/requirements.txt
index 1b9a4af..3d3fed4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ Mako==1.1.0
 Markdown==3.3.3
 MarkupSafe==1.1.1
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 multiprocess==0.70.11.1
 nbclient==0.5.1
 nbconvert==6.0.7