Ember Validations: Custom Validator Setup

I'm using Ember 2.3 and DockYard's ember-validations version "2.0.0-alpha.4". I'm using POD structure on my project.

No matter with predefined validations but I'm facing with injection problems while using custom validators.

As mentioned in documentation, I've placed my validators at my-app/app/validators/ directory. But they are not loaded. If I manually inject them by using a factory, they work. But ember-validations couldn't load them automatically.

How can I make ember-validations to load my custom validators?