diff --git a/requirements.txt b/requirements.txt
index cd109eb..7a690a3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -43,7 +43,7 @@ lxml==4.2.5
 MarkupSafe==1.0
 matplotlib==3.0.0
 mccabe==0.6.1
-mistune==0.8.3
+mistune==2.0.3
 nbconvert==5.4.0
 nbformat==4.4.0
 notebook==5.7.0