diff --git a/requirements.txt b/requirements.txt
index 21bb889..0e2134b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -59,7 +59,7 @@ lazy-object-proxy==1.3.1
 Markdown==3.0.1
 MarkupSafe==1.0
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 msgpack==0.5.6
 multidict==4.4.2
 nbconvert==5.4.0