Challenge http://www.freecodecamp.com/challenges/waypoint-add-borders-around-your-elements has an issue 

The following HTML is not working for this challenge:

<style>
  .smaller-image {
    width: 100px;
  }
  
  .thick-green-border{
    border-width: 10px; 
    border-color: green;
    border-style: solid;
  }
</style>

<img class='smaller-image thick-green-border' src='https://bit.ly/fcc-kittens'/>

I'm not sure what I'm doing wrong?
