diff --git a/web/requirements.txt b/web/requirements.txt
index 84c4a92..dd65e8c 100644
--- a/web/requirements.txt
+++ b/web/requirements.txt
@@ -27,7 +27,7 @@ gast==0.2.0
 gevent==1.3.7
 greenlet==0.4.15
 grpcio==1.12.0
-html5lib==0.9999999
+html5lib==0.99999999
 idna==2.6
 ipaddress==1.0.22
 ipykernel==4.9.0