diff --git a/requirements.txt b/requirements.txt
index de86008..ac9f812 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ jupyter-console==5.1.0
 jupyter-core==4.3.0
 MarkupSafe==1.0
 matplotlib==2.0.2
-mistune==0.7.4
+mistune==2.0.3
 more-itertools==3.1.0
 nbconvert==5.2.1
 nbformat==4.3.0