diff --git a/requirements.txt b/requirements.txt
index 0c8387e..d5e3b7f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ lupa==1.8
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.0
-mistune==0.8.4
+mistune==2.0.3
 mock==3.0.5
 murmurhash==1.0.2
 nbconvert==5.5.0