diff --git a/requirements.txt b/requirements.txt
index 9f8a8dd..17a9c60 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ kiwisolver==1.0.1
 Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==2.2.2
-mistune==0.8.3
+mistune==2.0.3
 nbconvert==5.3.1
 nbformat==4.4.0
 nose==1.3.7