diff --git a/requirements.txt b/requirements.txt
index 3197a1e..083ee23 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ jupyter-core==4.6.1
 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