diff --git a/requirements.txt b/requirements.txt
index bffd48f..21df1f9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ Mako==1.0.7
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 multidict==4.5.2
 nbconvert==5.5.0
 nbformat==4.4.0