diff --git a/python3/requirements.txt b/python3/requirements.txt
index 9a6bf7b..7b911eb 100644
--- a/python3/requirements.txt
+++ b/python3/requirements.txt
@@ -14,7 +14,7 @@ jupyter-core==4.0.6
 Keras==2.0.3
 MarkupSafe==0.23
 matplotlib==1.5.0
-mistune==0.7.1
+mistune==2.0.3
 nbconvert==4.1.0
 nbformat==4.0.1
 notebook==4.0.6