jsTree checkbox plugin - prevent parent node being checked when children are checked but check children when parent is checked

I am using the jstree plugin and have included the checkbox plugin. I have set three_state to false in order to prevent the parent node being checked when all child nodes have been checked.

However... I would still like the all child nodes to be selected when the parent node is selected...

Is there a way to achieve this? Any help would be greatly appreciated! Thanks!

Howard.

"checkbox" : {
  "three_state" : false,
},

"plugins": ["checkboxes"]