diff --git a/requirements.txt b/requirements.txt
index 12be9fe..34f1568 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -85,7 +85,7 @@ lxml==4.2.5
 MarkupSafe==1.0
 matplotlib==2.2.3
 mccabe==0.6.1
-mistune==0.8.3
+mistune==2.0.3
 mkl-fft==1.0.4
 mkl-random==1.0.1
 more-itertools==4.3.0