diff --git a/requirements.txt b/requirements.txt
index 5e2dc78..6d41d20 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ jsonschema==3.2.0
 jupyter-client==6.1.3
 jupyter-core==4.6.3
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.1
 nbformat==5.0.6
 notebook==6.0.3