fix compatibility with compose 1.5.0+
fix compatibility with compose 1.5.0+

https://github.com/docker/compose/commit/46e8e4322aa694f176c3fec5e705c5c40c704824
ljbx/diffy,twitter/diffy,ljbx/diffy,ljbx/diffy,twitter/diffy,twitter/diffy,camiloribeiro/diffy,ljbx/diffy,camiloribeiro/diffy,camiloribeiro/diffy,twitter/diffy,ljbx/diffy