diff --git a/requirements.txt b/requirements.txt
index 43e9e659..f7b81524 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ jupyter-core==4.6.3
 kiwisolver==1.2.0
 MarkupSafe==1.1.1
 matplotlib==3.2.2
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.4.0
 nbconvert==5.6.1
 nbformat==5.0.7