diff --git a/requirements.txt b/requirements.txt
index c1babc4..1fe2472 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -10,7 +10,7 @@ jupyter-console==6.0.0
 jupyter-core==4.5.0
 matplotlib==3.1.0
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.1.0
 nbconvert==5.5.0
 nbformat==4.4.0