Assertion Failed: No application initializer named 'store'

I've upgraded ember-cli from 2.x.x to 3.1.2, and suddenly one of my initalizers throwing this assertion error: Assertion Failed: No application initializer named 'store'

I think there is an ordering problem, one of my initalizers trying to import store which hasn't already been initialized.

Tried after: 'store' and after: 'ember-data' property in initalizers but none of them worked.

Thanks for your help!