diff --git a/app/requirements.txt b/app/requirements.txt
index 74d0c4a..1597562 100644
--- a/app/requirements.txt
+++ b/app/requirements.txt
@@ -29,7 +29,7 @@ kiwisolver==1.0.1
 Markdown==3.0.1
 MarkupSafe==1.1.0
 matplotlib==3.0.2
-mistune==0.8.4
+mistune==2.0.3
 mock==2.0.0
 nbconvert==5.3.1
 nbformat==4.4.0