diff --git a/requirements.txt b/requirements.txt
index 2f8b025..78129ae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ Flask-Script==2.0.5
 Flask-SQLAlchemy==2.1
 Flask-WTF==0.13.1
 Flask-Mail
-html5lib==0.9999999
+html5lib==0.999999999
 itsdangerous==0.24
 Jinja2==2.8
 Mako==1.0.4