Unknown props

[arronhunt]

import React, { Component } from 'react';
import Parallax from 'react-simple-parallax';

export default class Hero extends Component {
    render() {
        var background = {
            height: "1000px",
            backgroundImage: 'url(' + backgroundImage + ')',
        }
    return (
        <section className="hero">
            <Parallax speedDivider="3" backgroundStyle={background}>
                <!-- content -->
            </Parallax>
        </section>
    )
  }
}

Current implementation, but it throws an error:

Warning: Unknown props 'speedDivider', 'backgroundStyle' on <div> tag. Remove these props from the element. For details, see https://fb.me/react-unknown-prop