diff --git a/requirements.txt b/requirements.txt
index 2abaef0..cd25ec9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ jupyterlab-server==1.0.6
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.1.3
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.1
 nbformat==5.0.4
 netCDF4==1.5.3