diff --git a/requirements.txt b/requirements.txt
index c137995..ae68413 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ lazy-object-proxy==1.4.3
 MarkupSafe==1.1.1
 matplotlib==3.3.3
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 nbclient==0.5.1
 nbconvert==6.0.7
 nbformat==5.0.8