diff --git a/requirements.txt b/requirements.txt
index abdedbd..bcbbbee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -73,7 +73,7 @@ locket==0.2.0
 lxml==3.6.0
 MarkupSafe==0.23
 matplotlib==1.5.1
-mistune==0.7.2
+mistune==0.8.1
 mock==2.0.0
 mpmath==0.19
 multipledispatch==0.4.8