diff --git a/requirements.txt b/requirements.txt
index 53a9965..a29c467 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ lxml==4.6.3
 MarkupSafe==2.0.1
 matplotlib==3.4.2
 matplotlib-inline==0.1.2
-mistune==0.8.4
+mistune==2.0.3
 nbclient==0.5.3
 nbconvert==6.1.0
 nbformat==5.1.3