diff --git a/requirements.txt b/requirements.txt
index d007430..d3d7c17 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,7 +47,7 @@ kiwisolver==1.1.0
 Markdown==3.1                 
 MarkupSafe==1.1.1               
 matplotlib==3.1.0               
-mistune==0.8.4               
+mistune==2.0.3               
 mock==3.0.4               
 more-itertools==7.0.0               
 nbconvert==5.5.0