diff --git a/requirements.txt b/requirements.txt
index 90f4bbe..7896f87 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ jupyter-core==4.4.0
 jupyter==1.0.0
 jupyterlab-server==0.2.0
 jupyterlab==0.35.4
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.4.1
 nbformat==4.4.0
 notebook==5.7.8