diff --git a/install/notebook/requirements.txt b/install/notebook/requirements.txt
index 7725c889..0e1570c7 100644
--- a/install/notebook/requirements.txt
+++ b/install/notebook/requirements.txt
@@ -11,7 +11,7 @@ django-celery==3.2.1
 django-pgfields==1.4.4
 django-pgjsonb==0.0.23
 djangorestframework==3.5.3
-html5lib==0.9999999
+html5lib==0.99999999
 #python-igraph>=0.7.1
 jdatetime==1.7.2
 kombu==3.0.37                  # messaging