diff --git a/requirements.txt b/requirements.txt
index bb8f885..d537004 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -79,7 +79,7 @@ Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.0
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 mkl-service==2.0.2
 mock==3.0.5
 more-itertools==7.0.0