diff --git a/requirements.txt b/requirements.txt
index f2bd86f..d143fe2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -54,7 +54,7 @@ Mako==1.1.3
 MarkupSafe==1.1.1
 matplotlib==3.3.1
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.5.0
 multipledispatch==0.6.0
 nbconvert==5.6.1