diff --git a/requirement.txt b/requirement.txt
index 0c9177f..5e3cfe6 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -94,7 +94,7 @@ Mako==1.0.7
 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