diff --git a/requirements.txt b/requirements.txt
index 8b057be..2b039dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ gevent==1.2.2
 greenlet==0.4.15
 grpcio==1.17.0
 h5py==2.8.0
-html5lib==0.9999999
+html5lib==0.999999999
 idna==2.7
 imagesize==1.1.0
 ipdb==0.11