diff --git a/requirements.txt b/requirements.txt
index 07a20d5d..b7f90c19 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ lazy-object-proxy==1.3.1
 MarkupSafe==1.1.0
 matplotlib==3.0.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==4.3.0
 nbconvert==5.4.0
 nbformat==4.4.0