diff --git a/requirements.txt b/requirements.txt
index dc4a920..14ff383 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ Jinja2==2.10
 jsonschema==2.6.0
 lazy==1.3
 MarkupSafe==1.0
-mistune==0.8.1
+mistune==2.0.3
 nose==1.3.7
 oauth2client==4.1.2
 oauthlib==2.0.6