diff --git a/requirements.txt b/requirements.txt
index 6e5092d..7b899da 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -61,7 +61,7 @@ libcst==0.3.17
 MarkupSafe==1.1.1
 matplotlib==3.3.4
 mccabe==0.6.1
-mistune==0.8.4
+mistune==2.0.3
 mypy-extensions==0.4.3
 nbclient==0.5.3
 nbconvert==6.0.7