diff --git a/requirements.txt b/requirements.txt
index 3c51a93..09e3162 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ jupyterlab==0.27.0
 jupyterlab-launcher==0.4.2
 MarkupSafe==1.0
 matplotlib==2.0.2
-mistune==0.7.4
+mistune==2.0.3
 nbconvert==5.2.1
 nbformat==4.4.0
 nbstripout==0.3.1