diff --git a/requirements.txt b/requirements.txt
index 0a51a30..16960d2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ futures==3.2.0
 gast==0.2.0
 grpcio==1.12.1
 h5py==2.8.0
-html5lib==0.9999999
+html5lib==0.999999999
 idna==2.6
 ipykernel==4.8.2
 ipython==5.7.0