diff --git a/requirements.txt b/requirements.txt
index 8f4c8c4..fecccc7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,7 +47,7 @@ lxml==4.2.1
 MarkupSafe==1.0
 matplotlib==3.1.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.2.0
 nbconvert==5.6.1
 nbformat==4.4.0