diff --git a/requirements.txt b/requirements.txt
index 2a18486..d5ac223 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -56,7 +56,7 @@ kiwisolver==1.3.1
 Markdown==3.3.3
 MarkupSafe==1.1.1
 matplotlib==3.3.1
-mistune==0.8.4
+mistune==2.0.3
 nbclient==0.5.1
 nbconvert==6.0.7
 nbformat==5.0.8