diff --git a/requirements.txt b/requirements.txt
index f0fac3f..68958b3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ distlib==0.2.4
 gast==0.2.0
 grpcio==1.12.1
 h5py==2.7.0
-html5lib==0.9999999
+html5lib==0.999999999
 idna==2.2
 keyring==10.1
 keyrings.alt==1.3