diff --git a/requirements.txt b/requirements.txt
index 7d3b86c..1ba8db0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,7 +38,7 @@ lxml==4.3.1
 MarkupSafe==1.1.0
 matplotlib==3.0.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.4.1
 nbformat==4.4.0
 nose==1.3.7