Royal Caribbean invested around 23 million euros in revitalization of "Serenade of the Seas" in the Navantia shipyard in Cadiz, Spain.
The work, which lasted three weeks, included the addition of new services to the cruise ship, among which new technological options, catering and entertainment.

Royal Caribbean also added a new Concierge Club for suite guests, a Diamond Club for Crown & Anchor Society loyalty program members, the Crown and Castle Pub and the Royal Babies and Tots Nursery.  Wi-Fi has also been rolled out to the entire ship along with flat-panel televisions in all staterooms, an outdoor LED movie screen on the pool deck and a digital way-finding system.

Many of the changes to Serenade of the Seas are ideas that were originally implemented on Oasis of the Seas.  Company reported that, "Serenade of the Seas" is the eighth ship in their fleet that has been revitalized.