diff --git a/requirements.txt b/requirements.txt
index 2be3cd5..f1f9821 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,7 +29,7 @@ google-auth-oauthlib==0.4.1
 google-pasta==0.1.8
 grpcio==1.27.2
 h5py==2.10.0
-html5lib==0.9999999
+html5lib==0.99999999
 idna==2.9
 importlib-metadata==1.5.0
 ipykernel==5.1.4