diff --git a/requirements.txt b/requirements.txt
index fd16db6..6712459 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -97,7 +97,7 @@ MarkupSafe==1.1.0
 mask-rcnn==2.1
 matplotlib==3.0.2
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.10
 mkl-random==1.0.2
 more-itertools==4.3.0