diff --git a/requirements.txt b/requirements.txt
index dd47427..75a812a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ docutils==0.14
 Flask==0.12.2
 gast==0.2.0
 grpcio==1.10.0
-html5lib==0.9999999
+html5lib==0.99999999
 idna==2.6
 itsdangerous==0.24
 Jinja2==2.10