diff --git a/requirements.txt b/requirements.txt
index 59accbe..23e4169 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ lxml==4.4.1
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.0
 nbformat==4.4.0
 notebook==6.0.1