diff --git a/requirements-dev.txt b/requirements-dev.txt
index ace0a5b..4d795c5 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -55,7 +55,7 @@ jupyterlab-widgets==1.0.2; python_version >= '3.6'
 lxml==4.8.0; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3, 3.4'
 markupsafe==2.1.1; python_version >= '3.7'
 matplotlib-inline==0.1.3; python_version >= '3.5'
-mistune==0.8.4
+mistune==2.0.3
 mongomock==4.0.0
 nbclient==0.5.13; python_version >= '3.7'
 nbconvert==6.4.4; python_version >= '3.7'