diff --git a/requirements.txt b/requirements.txt
index a20e669..e151eb1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -91,7 +91,7 @@ lxml==4.1.1
 MarkupSafe==1.0
 matplotlib==2.1.2
 mccabe==0.6.1
-mistune==0.8.3
+mistune==2.0.3
 mpmath==1.0.0
 msgpack-python==0.5.1
 multipledispatch==0.4.9