diff --git a/requirements.txt b/requirements.txt
index 96a6e61..058f009 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -55,7 +55,7 @@ macaroonbakery==1.3.1
 Mako==1.1.0
 MarkupSafe==1.1.0
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 monotonic==1.5
 nbconvert==5.6.1
 nbformat==5.0.7