diff --git a/requirements.txt b/requirements.txt
index c9a4935..9442b1f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ jupyterlab==0.35.4
 jupyterlab-server==0.2.0
 markdown2==2.3.7
 MarkupSafe==1.1.0
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.4.0
 nbformat==4.4.0
 notebook==5.7.2