diff --git a/requirements.txt b/requirements.txt
index 22fdcc1..0ab9d8e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -83,7 +83,7 @@ lxml==4.2.1
 MarkupSafe==1.0
 matplotlib==2.2.2
 mccabe==0.6.1
-mistune==0.8.3
+mistune==2.0.3
 mkl-fft==1.0.0
 mkl-random==1.0.1
 more-itertools==4.1.0