"Ruben has been an absolutely outstanding addition to the squad since his arrival last summer and is thoroughly deserving of his new deal," sporting director Kevin Thelwell told the club's website.
"Ruben has taken everything in his stride since joining us, and I am positive he will continue his form into next season and have a huge impact on the Premier League."
Wolves, who were relegated from the Premier League in 2012, begin their campaign next month with a home game against Everton.
(Reporting By Arnab Paul in Bengaluru; Editing by Amlan Chakraborty)
