diff --git a/requirements.txt b/requirements.txt
index 200fde5..aa408af 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ Keras==2.2.4
 Keras-Applications==1.0.8
 Keras-Preprocessing==1.1.0
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.5.0
 nbformat==4.4.0
 notebook==5.7.8