Composer不安装子依赖项

I have a problem with composer.json.

Why my second composer.json don't install dependancies fineuploader/php-traditional-server when I execute composer install from Project ?

Project > composer.json :

{
    "type": "project",
    "license": "proprietary",
    "require": {
        ...
        "gaylordp/symfony-fineuploader-bundle": "dev-master"
        ...

gaylordp/symfony-fineuploader-bundle > composer.json

{
    "name": "gaylordp/symfony-fineuploader-bundle",
    "type": "symfony-bundle",
    "require": {
        ...
        "fineuploader/php-traditional-server": "^1.2"
        ...