diff --git a/requirements.txt b/requirements.txt
index ca212e0..71afd1c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ decorator==4.3.0
 gast==0.2.0
 grpcio==1.14.0
 h5py==2.7.1
-html5lib==0.9999999
+html5lib==0.999999999
 ipykernel==4.8.2
 ipython==6.5.0
 ipython-genutils==0.2.0