diff --git a/requirements.txt b/requirements.txt
index b7fdc6d..d7811e9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -34,7 +34,7 @@ louis==1.3
 lxml==3.5.0
 Markdown==2.6.11
 MarkupSafe==1.0
-mistune==0.8.3
+mistune==2.0.3
 nbconvert==5.3.1
 nbformat==4.4.0
 nose==1.3.7