diff --git a/requirements.txt b/requirements.txt
index 9c465e1..c0e45fc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -113,7 +113,7 @@ lxml==4.3.3
 MarkupSafe==1.1.1
 matplotlib==3.0.3
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.12
 mkl-random==1.0.2
 more-itertools==7.0.0