diff --git a/requirements.txt b/requirements.txt
index b7b22ac..16bd009 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -136,7 +136,7 @@ Markdown==3.2.2
 MarkupSafe==1.1.1
 matplotlib==3.1.3
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-fft==1.0.15
 mkl-random==1.1.0
 mkl-service==2.3.0