diff --git a/requirements.txt b/requirements.txt
index b89257d..7a514d2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ jupyter-console==5.1.0
 jupyter-core==4.3.0
 MarkupSafe==1.0
 matplotlib==2.0.2
-mistune==0.8.1
+mistune==2.0.3
 nbconvert==5.1.1
 nbformat==4.3.0
 notebook==6.4.1