diff --git a/requirements.txt b/requirements.txt
index a824b99..b0dcaa5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ jupyter-core==4.6.3
 kiwisolver==1.0.1
 MarkupSafe==1.1.1
 matplotlib==3.0.3
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==7.2.0
 MouseInfo==0.1.3
 nbconvert==5.6.1