diff --git a/requirements.txt b/requirements.txt
index ecbb2d1..ed0a502 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -35,7 +35,7 @@ kiwisolver==1.0.1
 Markdown==3.0.1
 MarkupSafe==1.1.0
 matplotlib==3.0.1
-mistune==0.8.4
+mistune==2.0.3
 munkres==1.0.12
 nbconvert==5.3.1
 nbformat==4.4.0