diff --git a/requirements.txt b/requirements.txt
index f5d3e098..0f764ac3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ cornflake==0.2.4
 Flask==1.0.2
 flask-admin==1.5.3
 Flask-SQLAlchemy==2.4.0
-html5lib==0.9999999
+html5lib==0.99999999
 inflection==0.3.1
 iso8601==0.1.12
 itsdangerous==1.1.0