{
    "name": "zendframework/zend-config",
    "description": "provides a nested object property based user interface for accessing this configuration data within application code",
    "license": "BSD-3-Clause",
    "keywords": [
        "zf2",
        "config"
    ],
    "autoload": {
        "psr-0": {
            "Zend\\Config\\": ""
        }
    },
    "target-dir": "Zend/Config",
    "require": {
        "php": ">=5.3.3",
        "zendframework/zend-stdlib": "self.version",
        "zendframework/zend-json": "self.version"
    },
    "suggest": {
        "zendframework/zend-servicemanager": "Zend\\ServiceManager for use with the Config Factory to retrieve reader and writer instances"
    },
    "extra": {
        "branch-alias": {
            "dev-master": "2.2-dev",
            "dev-develop": "2.3-dev"
        }
    }
}

{
    "name": "zendframework/zend-config",
    "description": "provides a nested object property based user interface for accessing this configuration data within application code",
    "license": "BSD-3-Clause",
    "keywords": [
        "zf2",
        "config"
    ],
    "autoload": {
        "psr-0": {
            "Zend\\Config\\": ""
        }
    },
    "target-dir": "Zend/Config",
    "require": {
        "php": ">=5.3.3",
        "zendframework/zend-stdlib": "self.version"
    },
    "suggest": {
        "zendframework/zend-servicemanager": "Zend\\ServiceManager for use with the Config Factory to retrieve reader and writer instances",
        "zendframework/zend-json": "Zend\\Json to use the Json reader or writer classes"
    },
    "extra": {
        "branch-alias": {
            "dev-master": "2.2-dev",
            "dev-develop": "2.3-dev"
        }
    }
}

Move zend-json dependency to the suggest list
Move zend-json dependency to the suggest list