diff --git a/requirements.txt b/requirements.txt
index 35f27d4..3e76a92 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ kiwisolver==1.1.0
 lxml==4.4.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 nbconvert==5.6.1
 nbformat==4.4.0