Use PropTypes to Define the Props You Expect [SOLVED]

why my code does not seem to pass the last challenge. it says to check if the prop is a number or not ,i think i did that in this line here :

quantity: PropTypes.number.isRequired 

but still it wont pass the last test. anyone wanna help me understand whats going on here.
test

Your code so far


const Items = (props) => {
  return <h1>Current Quantity of Items in Cart: {props.quantity}</h1>
};
// change code below this line
Items.PropTypes ={
  quantity: PropTypes.number.isRequired 
  }
// change code above this line

Items.defaultProps = {
  quantity: 0
};

class ShoppingCart extends React.Component {
  constructor(props) {
    super(props);
  }
  render() {
    return <Items />
  }
};

Link to the challenge:

PropTypes should be propTypes

thanks. didn’t notice it at all.