diff --git a/requirements.txt b/requirements.txt
index d04801a..cb682ec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ Keras==2.1.1
 Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==2.0.1
-mistune==0.8.3
+mistune==2.0.3
 nbconvert==5.3.1
 nbformat==4.4.0
 notebook==5.4.0