diff --git a/requirements.txt b/requirements.txt
index 44fb99c..c2b10c0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -78,7 +78,7 @@ lxml==3.7.3
 Markdown==2.6.8
 MarkupSafe==0.23
 matplotlib==2.0.2
-mistune==0.7.4
+mistune==0.8.1
 mpmath==0.19
 msgpack-python==0.4.8
 multipledispatch==0.4.9