diff --git a/requirements.txt b/requirements.txt
index 04597381..21776919 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -95,7 +95,7 @@ matplotlib==3.0.2
 mccabe==0.6.1
 meld3==1.0.2
 menuinst==1.4.14
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.6
 mkl-random==1.0.2
 more-itertools==4.3.0