diff --git a/requirements.txt b/requirements.txt
index eb45e1e..5c39a88 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -53,7 +53,7 @@ Markdown==3.0.1
 MarkupSafe==1.1.1
 mccabe==0.6.1
 Mesa==0.8.5
-mistune==0.8.4
+mistune==2.0.3
 mock==2.0.0
 more-itertools==6.0.0
 multiprocess==0.70.7