diff --git a/requirements.txt b/requirements.txt
index 11888c6..cfce301 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ gast==0.2.2
 grpcio==1.19.0
 guacamole==0.9.2
 h5py==2.9.0
-html5lib==0.999
+html5lib==0.999999999
 httplib2==0.9.1
 idna==2.0
 isort==4.3.15