diff --git a/requirements.txt b/requirements.txt
index e04b82e..2932948 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -39,7 +39,7 @@ lazy-object-proxy==1.4.1
 Mako==1.1.0
 MarkupSafe==1.1.1
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 multidict==4.5.2
 nbconvert==5.6.0