diff --git a/requirements.txt b/requirements.txt
index 5377e2d..05f4276 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.0.2
 nbconvert==5.6.1
 nbformat==4.4.0