diff --git a/requirements.txt b/requirements.txt
index e97f51b..8111bd5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -42,7 +42,7 @@ google-resumable-media==0.2.3
 googleapis-common-protos==1.5.2
 grpc-google-iam-v1==0.11.4
 grpcio==1.7.0
-html5lib==0.9999999
+html5lib==0.999999999
 httplib2==0.10.3
 idna==2.6
 imageio==2.1.2