diff --git a/requirements.txt b/requirements.txt
index 384cd6e..2b1a089 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ Markdown==3.0.1
 MarkupSafe==1.0
 matplotlib==3.0.1
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 Naked==0.1.31
 nbconvert==5.4.0
 nbformat==4.4.0