diff --git a/requirements.txt b/requirements.txt
index deeb04b..8e5b41e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -44,7 +44,7 @@ jsonschema==3.2.0
 kiwisolver==1.1.0
 Markdown==3.2.1
 MarkupSafe==1.1.1
-mistune==0.8.4
+mistune==2.0.3
 mkl
 more-itertools==8.2.0
 murmurhash==1.0.2