diff --git a/requirements.txt b/requirements.txt
index 54245bb..9e08761 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -60,7 +60,7 @@ Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.2.1
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.2.0
 nbconvert==5.6.1
 nbformat==5.0.4