diff --git a/code_court/courthouse/requirements.txt b/code_court/courthouse/requirements.txt
index c8368e8..35973ad 100644
--- a/code_court/courthouse/requirements.txt
+++ b/code_court/courthouse/requirements.txt
@@ -53,7 +53,7 @@ lockfile==0.12.2
 lxml==4.6.2
 Markdown==3.3.3
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 msgpack==0.6.2
 nbclient==0.5.1
 nbconvert==6.0.7