diff --git a/requirements.txt b/requirements.txt
index 31f86e4..6257414 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ kiwisolver==1.1.0
 Markdown==3.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3
-mistune==0.8.4
+mistune==2.0.3
 mock==2.0.0
 munch==2.3.2
 nbconvert==5.5.0