diff --git a/requirements.txt b/requirements.txt
index 92142a1a..7218781a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ lesscpy==0.13.0
 MarkupSafe==1.1.1
 matplotlib==3.1.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 nbconvert==5.6.1
 nbformat==4.4.0