diff --git a/requirements.txt b/requirements.txt
index 514b2748f..df6721342 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ mailchecker>=4.0.1
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.0
 nbdev==1.1.0
 nbformat==4.4.0