diff --git a/requirements.txt b/requirements.txt
index cfdc04d..5367faf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -40,7 +40,7 @@ keras-nightly==2.5.0.dev2021032900
 Keras-Preprocessing==1.1.2
 Markdown==3.3.4
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 nbclient==0.5.3
 nbconvert==6.0.7
 nbformat==5.1.3