No provider for Http - ionic2 alpha 42

Can you try with this?:

import {Http, Headers} from 'angular2/http';
@Injectable()
export class AppData {
  constructor(private http: Http) {
  }
}

If not working then it is an issue with the update or you may need to update the npm packages as this should come from angular2 and not from ionic (i think), have you tried to search http in angular 2 package in node_modules?