diff --git a/requirements.txt b/requirements.txt
index 794f0dc..1b36f03 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ kiwisolver==1.0.1
 markdown-textwrap==0.2.1
 MarkupSafe==1.0
 matplotlib==2.2.2
-mistune==0.8.3
+mistune==2.0.3
 nbconvert==5.3.1
 nbformat==4.4.0
 notebook==5.6.0