Composer doesn't autoload packages

I'm currently developing a framework but I couldn't figure out how am I going to set autoloading. First I created a package with sample class and composer.json. I've autoloaded that sample class by:

"autoload": {
"classmap": [
"libs/"
]
}
I've checked /vendor/mypackage/vendor/composer/autoload_classmap.php and confirmed that package's autoloader is working fine. But the problem is I can't reach that package's class from main app unless I directly include that package's autoload.php.

**UPDATE**

/vendor/foo/mypackage/composer.json

"autoload": {
"psr-4": {
"Http\\": "libs/"
}
}

/vendor/foo/mypackage/libs/Request.php

namespace Http;
class Request {}

First of all, it's often better to use `psr-0` or `psr-4` autoloading config. With the classmap, you have to redump the autoloader each time you add a new class or rename one.

You always need to include the Composer autoloader by using `require 'vendor/autoload.php';`. The best place to add such require statement is in your front controller file.

Solved it by myself. I just had to reinstall package whenever I change pacakge's composer.json.