diff --git a/requirements.txt b/requirements.txt
index eb5526e..0fcab3d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@ jupyter-core==4.4.0
 kiwisolver==1.0.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.4.1
 nbformat==4.4.0
 nose==1.3.7