diff --git a/requirements.txt b/requirements.txt
index 41c2419..a5d5d2b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -73,7 +73,7 @@ keyrings.alt==3.0
 language-check==1.1
 Markdown==3.2.1
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 murmurhash==1.0.2
 nanotime==0.5.2
 nbconvert==5.6.1