diff --git a/requirements.txt b/requirements.txt
index 5a207d0..9452877 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ kiwisolver==1.0.1
 Markdown==3.0.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.4.1
 nbformat==4.4.0
 networkx==2.2