diff --git a/requirements.txt b/requirements.txt
index a744c5b..c423eaa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ lunardate==0.2.0
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.2
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.1.0
 nbconvert==5.6.1
 nbformat==5.0.3