Lewis Williamson will graduate to next year's Formula Renault 3.5 championship with Arden, for which he raced in GP3 in 2011. Next season will also see Williamson race as part of the Red Bull Junior Team program.
The 22-year-old contested four races in Formula Renault 3.5 this year for ISR, while he claimed one victory and three podiums in GP3.
Williamson said he was pleased to stay with the team he has raced with this season as he steps up to FR3.5.
"It's a pretty cool opportunity to learn and great to stay with the team which helped me to learn all the circuits in 2011," he said. "I hope I can just get better, more consistent and run at the front."
Williamson is also one of 18 drivers chosen for the 2012 FIA Institute Young Driver Excellence Academy.