How can I remove the widget's border radius?

[dblakenz]

Hi there,

This is my first time using the Twitter Widget and I have it up an running and looking good, however the feed has rounded corners which I want to get rid of. Using the inspector in Chrome I can see (as per the image below) that the class".timeline-Widget" has a border-radius of 4px, and unticking/removing it in the inspector fixes the issue.
However when I try to remove this in CSS it wont work:

.timeline-Widget{
border-radius: 0px!important;
}

Looking at the inspector in Chrome I can see this is referencing a stylesheet hosted by Twitter. So my question is, how can I remove the border radius for this element?

Any help here would be appreciated!

Thanks!