Trouble replacing daytime running lights

[Flanders]

Hi.
In my chevrolet aveo 2010 hatchback, I am trying to replace the small headlights next to the large headlights (the daylight running light).

I can twist the socket of it (black in the picture, with a green and a black wire). But it doesnt come out. Are there any tricks required to get it out? The lightbulbs need replacement.