diff --git a/requirements.txt b/requirements.txt
index afa8b79..3a8d4c7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ llvmlite==0.34.0
 Markdown==3.3.2
 MarkupSafe==1.1.1
 matplotlib==3.3.2
-mistune==0.8.4
+mistune==2.0.3
 nbclient==0.5.1
 nbconvert==6.0.7
 nbformat==5.0.8