diff --git a/greent/requirements.txt b/greent/requirements.txt
index e4c6eefe..2a64a655 100644
--- a/greent/requirements.txt
+++ b/greent/requirements.txt
@@ -36,7 +36,7 @@ jupyter-core==4.3.0
 jupyterlab==0.27.0
 jupyterlab-launcher==0.5.1
 MarkupSafe==1.0
-mistune==0.7.4
+mistune==2.0.3
 mock==2.0.0
 nbconvert==5.3.1
 nbformat==4.4.0