diff --git a/requirements.txt b/requirements.txt
index 05a3af9..a812580 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -97,7 +97,7 @@ Markdown==2.6.9
 MarkupSafe==1.0
 matplotlib==2.1.0
 mccabe==0.6.1
-mistune==0.7.4
+mistune==2.0.3
 more-itertools==4.0.1
 mpmath==0.19
 msgpack==0.5.1