diff --git a/requirements.txt b/requirements.txt
index cbe44aa3..5dc1d3eb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -93,7 +93,7 @@ Markdown==2.6.11
 MarkupSafe==1.0
 matplotlib==3.0.3
 mccabe==0.6.1
-mistune==0.8.3
+mistune==2.0.3
 mkl-fft==1.0.10
 mkl-random==1.0.2
 more-itertools==4.1.0