diff --git a/requirements.txt b/requirements.txt
index 9588319..437aa95 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,7 +33,7 @@ jupyter-core==4.6.3
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==2.2.5
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.1
 nbformat==4.4.0
 notebook==5.7.8