Could not find a version of package matching your minimum-stability (stable).

[faiyaz-ergo]

Could not find a version of package sngrl/php-firebase-cloud-messaging matching your minimum-stability (stable). Require it with an explicit version constraint allowing its desired stability.

Tried to use in Slim 3 framework.

[ecr007]

set :dev-master option, example:

composer require sngrl/php-firebase-cloud-messaging:dev-master