diff --git a/requirements.txt b/requirements.txt
index 94347b2..19b199c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ Keras-Preprocessing==1.0.5
 lz4==2.1.6
 Markdown==3.0.1
 MarkupSafe==1.1.0
-mistune==0.8.4
+mistune==2.0.3
 mock==2.0.0
 more-itertools==5.0.0
 nbconvert==5.4.0