diff --git a/requirements.txt b/requirements.txt
index d27dd13..20e5a76 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ jupyter-client==5.3.4
 jupyter-console==6.0.0
 jupyter-core==4.6.1
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.0.2
 nbconvert==5.6.1
 nbformat==4.4.0