diff --git a/requirements.txt b/requirements.txt
index 85cf293..6e3a30f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -30,7 +30,7 @@ jupyterlab-server==0.2.0
 kiwisolver==1.0.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.4.1
 nbdime==1.1.1
 nbformat==4.4.0