diff --git a/requirements.txt b/requirements.txt
index 8dbbeb4..c55d104 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -53,7 +53,7 @@ Keras-Applications==1.0.7
 Keras-Preprocessing==1.0.8
 Markdown==3.0.1
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 nbconvert==5.6.0
 nbformat==4.4.0