diff --git a/requirements.txt b/requirements.txt
index 51ed208..65e1f41 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ jupyter-core==4.6.3
 kiwisolver==1.2.0
 MarkupSafe==1.1.1
 matplotlib==3.3.1
-mistune==0.8.4
+mistune==2.0.3
 nbconvert==5.6.1
 nbformat==5.0.7
 notebook==6.4.1