diff --git a/requirements.txt b/requirements.txt
index ae6a4b5..8e43d40 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ kiwisolver==1.0.1
 lesscpy==0.13.0
 MarkupSafe==1.1.0
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==5.0.0
 nbconvert==5.4.0
 nbdime==1.0.4