diff --git a/requirements.txt b/requirements.txt
index cda8a40..a3fa13e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ jupyterlab==1.1.4
 jupyterlab-server==1.0.6
 Mako==1.1.0
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 nbconvert==5.6.0
 nbformat==4.4.0