diff --git a/requirements.txt b/requirements.txt
index 58d13e8..e05a03e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,7 +47,7 @@ lxml==4.4.2
 Markdown==3.1
 MarkupSafe==1.1.0
 matplotlib==3.0.2
-mistune==0.8.4
+mistune==2.0.3
 mock==2.0.0
 more-itertools==8.2.0
 mpmath==1.1.0