diff --git a/requirements.txt b/requirements.txt
index 569d870..3c1e40b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -74,7 +74,7 @@ Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.1.0
 nbconvert==5.4.0
 nbformat==4.4.0