diff --git a/requirements.txt b/requirements.txt
index 7ef56c2..188c193 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -57,7 +57,7 @@ Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==5.0.0
 nbconvert==5.5.0
 nbformat==4.4.0