diff --git a/requirements.txt b/requirements.txt
index 1cffd26..023b09f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -61,7 +61,7 @@ Markdown==3.1
 MarkupSafe==0.23
 matplotlib==3.0.2
 mccabe==0.2.1
-mistune==0.8.4
+mistune==2.0.3
 mock==2.0.0
 nbconvert==5.4.0
 nbformat==4.4.0