diff --git a/requirements.txt b/requirements.txt
index a6e7271..bd39864 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,7 +21,7 @@ jupyterlab-server==1.0.6
 kiwisolver==1.1.0
 MarkupSafe==1.1.1
 matplotlib==3.1.1
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 nbconvert==5.6.1
 nbformat==4.4.0