The Dutch Eredivisie club will receive é¼1.18 million per season for the deal, with Interpolis continuing their association at the Willem II Stadion since first signing in 1998.
Meanwhile, Willem II are planning not to make any major summer moves but are on the lookout for a new striker.
The Tilburg side have yet to receive an offer for Dutch international midfielder Denny Landzaat but Belgian World Cup goalkeeper Geert de Vlieger has attracted the interest of Jupiler League outfit Standard Liege.
However, their bid for the Belgian number one was not enough for Willem II to accept.