Conflict while Installing with composer require

Hello, I'm trying to install this to my yii2 project, but I got this problem.

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - The requested package simple-projects/yii2-sbadmin * is satisfiable by simple-projects/yii2-sbadmin[dev-master] but these conflict with your requirements or minimum-stability.

I try to delete some require and the minimum stability, but still can't figure it out. Here is my composer code

{
    "name": "yiisoft/yii2-app-basic",
    "description": "Yii 2 Basic Project Template",
    "keywords": ["yii2", "framework", "basic", "project template"],
    "homepage": "http://www.yiiframework.com/",
    "type": "project",
    "license": "BSD-3-Clause",
    "support": {
        "issues": "https://github.com/yiisoft/yii2/issues?state=open",
        "forum": "http://www.yiiframework.com/forum/",
        "wiki": "http://www.yiiframework.com/wiki/",
        "irc": "irc://irc.freenode.net/yii",
        "source": "https://github.com/yiisoft/yii2"
    },
    "minimum-stability": "stable",
    "require": {
        "php": ">=5.4.0",
        "yiisoft/yii2": "~2.0.14",
        "yiisoft/yii2-bootstrap": "~2.0.0",
        "yiisoft/yii2-swiftmailer": "~2.0.0 || ~2.1.0",
        "yiidoc/yii2-redactor": "*",
        "johnitvn/yii2-ajaxcrud": "*",
        "codemix/yii2-excelexport": "^2.7",
        "simple-projects/yii2-sbadmin": "*"
    },
    "require-dev": {
        "yiisoft/yii2-debug": "~2.1.0",
        "yiisoft/yii2-gii": "~2.1.0",
        "yiisoft/yii2-faker": "~2.0.0",

        "codeception/base": "~2.3.0",
        "codeception/verify": "~0.4.0",
        "codeception/specify": "~0.4.6",
        "symfony/browser-kit": ">=2.7 <=4.2.4"
    },
    "config": {
        "process-timeout": 1800,
        "fxp-asset": {
            "enabled": false
        }
    },
    "scripts": {
        "post-install-cmd": [
            "yii\\composer\\Installer::postInstall"
        ],
        "post-create-project-cmd": [
            "yii\\composer\\Installer::postCreateProject",
            "yii\\composer\\Installer::postInstall"
        ]
    },
    "extra": {
        "yii\\composer\\Installer::postCreateProject": {
            "setPermission": [
                {
                    "runtime": "0777",
                    "web/assets": "0777",
                    "yii": "0755"
                }
            ]
        },
        "yii\\composer\\Installer::postInstall": {
            "generateCookieValidationKey": [
                "config/web.php"
            ]
        }
    },
    "repositories": [
        {
            "type": "composer",
            "url": "https://asset-packagist.org"
        }
    ]
}

atanas-mavrov / yii2-sbadmin

Conflict while Installing with composer require #1