diff --git a/requirements.txt b/requirements.txt
index 07a69b6..9ce665a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ jupyter-client==4.2.2
 jupyter-console==4.1.1
 jupyter-core==4.1.0
 MarkupSafe==0.23
-mistune==0.7.2
+mistune==2.0.3
 nbconvert==4.1.0
 nbformat==4.0.1
 nltk==3.2