How to solve two packages requirements conflicts when running composer install?

I want to install these two packages:

• "anahkiasen/former": "dev-master"
• "vespakoen/menu": "dev-master"

But composer says that each of them depends on diferent versions of this package:

• "anahkiasen/html-object": "dev-master"
• "anahkiasen/html-object": "1.1.2"

Problem 1

- Installation request for anahkiasen/former dev-master -> satisfiable by anahkiasen/former[dev-master].
- Can only install one of: anahkiasen/html-object[dev-master, 1.1.2].
- vespakoen/menu dev-master requires anahkiasen/html-object 1.1.2 -> satisfiable by anahkiasen/html-object[1.1.2].
- anahkiasen/former dev-master requires anahkiasen/html-object dev-master -> satisfiable by anahkiasen/html-object[dev-master].
- Installation request for vespakoen/menu dev-master -> satisfiable by vespakoen/menu[dev-master].

How can I solve it?