diff --git a/requirements.txt b/requirements.txt
index 929afc5..a1b6a9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ gevent-socketio==0.3.6
 gevent-websocket==0.9.3
 greenlet==0.4.2
 gunicorn==18.0
-html5lib==0.999
+html5lib==0.999999999
 isodate==0.5.0
 itsdangerous==0.24
 Jinja2==2.7.3