diff --git a/requirements.txt b/requirements.txt
index be63ec5..141c5ef 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ lockfile==0.12.2
 Mako==1.0.6
 MarkupSafe==1.0
 matplotlib==2.0.2
-mistune==0.8.4
+mistune==2.0.3
 natsort==6.0.0
 nbconvert==5.4.0
 nbformat==4.4.0