diff --git a/requirements.txt b/requirements.txt
index d83d898..c42c98e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ gast==0.2.0
 grpcio==1.13.0
 gunicorn==19.9.0
 h5py==2.9.0
-html5lib==0.9999999
+html5lib==0.999999999
 itsdangerous==0.24
 Jinja2==2.10
 jsonschema==2.6.0