diff --git a/py/requirements.txt b/py/requirements.txt
index 4097fe8..a5bb5dd 100644
--- a/py/requirements.txt
+++ b/py/requirements.txt
@@ -32,7 +32,7 @@ Keras-Applications==1.0.8
 Keras-Preprocessing==1.1.0
 Markdown==3.1.1
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.0
 nbformat==4.4.0
 notebook==6.0.1