diff --git a/requirements.txt b/requirements.txt
index 09f49dd..7756f4d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -36,7 +36,7 @@ lxml==4.2.1
 MarkupSafe==1.0
 matplotlib==2.2.2
 mccabe==0.6.1
-mistune==0.8.3
+mistune==2.0.3
 nbconvert==5.3.1
 nbformat==4.4.0
 notebook==5.6.0