diff --git a/requirements.txt b/requirements.txt
index 6f4d684..7b6238a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -93,7 +93,7 @@ macholib==1.11
 MarkupSafe==1.1.0
 matplotlib==3.0.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.6
 mkl-random==1.0.2
 more-itertools==4.3.0