diff --git a/requirements.txt b/requirements.txt
index 2b839ad..1510c30 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ jupyter-client==6.1.3
 jupyter-console==6.1.0
 jupyter-core==4.6.3
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.3.0
 nbconvert==5.6.1
 nbformat==5.0.6