British online gambling firm 888 will pay a smaller price to buy William Hill’s international assets from U.S.-based owner Caesars Entertainment, the companies said on Thursday, citing changes in economic and regulatory conditions.

Shares in London-listed 888 soared nearly 30% after the British company also said it would have to raise less capital to partly fund the purchase.

Las Vegas-based casino operator Caesars bought British bookmaker William Hill in a $4 billion deal last year and agreed in September to sell William Hill’s non-U.S. assets to 888 for 2.2 billion pounds ($2.88 billion).