diff --git a/requirements.txt b/requirements.txt
index b01ad15..865fe6e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,7 +46,7 @@ kiwisolver==1.0.1
 Markdown==3.0.1
 MarkupSafe==1.0
 matplotlib==3.0.0
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.4.0
 nbformat==4.4.0
 networkx==2.2