Problem with installation. Constrains problem

[ironbone]

Mayby this is more related with the book?

I install the newest CakePHP
composer create-project --prefer-dist cakephp/app:~5.0 AutTest
Then in the root of the app I call (as sugested in the book)
composer require "cakephp/authentication:^3.0"

wich give me the followin error:

The "3.0" constraint for "cakephp/authentication" appears too strict and will likely not match what you want. See https://getcomposer.org/constraints
./composer.json has been updated
Running composer update cakephp/authentication
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - Root composer.json requires cakephp/authentication 3.0 -> satisfiable by cakephp/authentication[3.0.0].
    - cakephp/authentication 3.0.0 requires cakephp/http 5.x-dev -> found cakephp/http[5.x-dev] but it does not match your minimum-stability.


Installation failed, reverting ./composer.json and ./composer.lock to their original content.

[dereuromark]

It might eat the ^ char, depending on what console you are using, try ~ to see if thats the issue.