diff --git a/requirements.txt b/requirements.txt
index b5ee15c..2c7ccdf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ jupyter-core==4.3.0
 lxml==4.1.1
 Markdown==2.6.8
 MarkupSafe==1.0
-mistune==0.7.4
+mistune==0.8.1
 mock==2.0.0
 nbconvert==5.3.0
 nbformat==4.4.0