Steve Wynn might have to shell out more money for his Everett casino project.

The Massachusetts Gaming Commission approved Wynn Resorts’ environmental and traffic plans for its proposed $2 billion casino development in Everett, the Boston Herald reported. But with one caveat—the operator will have to pay extra to relieve the traffic concerns in Charlestown’s Sullivan Square.

Wynn is already on the hook for $36 million to improve traffic in Sullivan Square, but Attorney General Maura Healey pushed state officials back in February “to do more to hold casino magnate Steve Wynn accountable” for the Wynn Boston Harbor casino, which she believes lack any “long-term” plan to alleviate traffic concerns.

Last Monday, state gaming regulators approved the Section 61 findings, an environmental study conducted by several state agencies on the Wynn project.