diff --git a/requirements.txt b/requirements.txt
index 1959f48..c5d5237 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -65,7 +65,7 @@ kiwisolver==1.1.0
 Markdown==3.1.1
 MarkupSafe==1.1.1
 matplotlib==3.1.2
-mistune==0.8.4
+mistune==2.0.3
 more-itertools==8.0.2
 munkres==1.1.2
 murmurhash==1.0.2