diff --git a/requirements.txt b/requirements.txt
index b7fdc6d..01bda98 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ entrypoints==0.2.3
 gast==0.2.0
 grpcio==1.12.1
 h5py==2.8.0
-html5lib==0.9999999
+html5lib==0.99999999
 idna==2.7
 imagesize==1.0.0
 ipykernel==4.8.2