laravel 上传文件验证类型时，docx文件无法通过验证

request 文件如下

<?php

namespace App\Http\Requests\Api;

use Illuminate\Foundation\Http\FormRequest;

class FileRequest extends FormRequest
{
    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */
    public function authorize()
    {
        return true;
    }

    /**
     * Get the validation rules that apply to the request.
     *
     * @return array
     */
    public function rules()
    {
        return [
            'file' => 'required|file|mimes:jpg,jpeg,png,pdf,doc,docx,xls,xlsx,ppt,pptx,cdr,zip,rar,7z,bz2',
        ];
    }
}

但是上传docx文件仍然无法通过验证，其它文件正常。