diff --git a/requirements.txt b/requirements.txt
index 9d8c8ce..f294c50 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ jsonschema==2.6.0
 jupyter-client==5.2.4
 jupyter-console==6.0.0
 jupyter-core==4.4.0
-mistune==0.8.4
+mistune==2.0.3
 mujoco-py==1.50.1.68
 nbconvert==5.4.0
 nbformat==4.4.0