diff --git a/requirements.txt b/requirements.txt
index f6e9d12..9b8a361 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ kiwisolver==1.0.1
 Markdown==3.0.1
 MarkupSafe==1.1.1
 matplotlib==3.0.2
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.1
 nbformat==5.0.7
 numpy==1.15.4