Unionized UPS workers could strike from the Atlanta-based company, scrambling supply chains and home delivery

Unionized UPS workers voted overwhelmingly on Friday to authorize a strike, setting the stage for a potential work stoppage if the package delivery company and Teamsters can’t come to an agreement before their contract expires next month.

The Teamsters said 97% of unionized workers voted for the authorization, which the union urged for in order to have more leverage during negotiations with the company. But a yes vote does not mean a strike is imminent.

“If this multibillion-dollar corporation fails to deliver on the contract that our hardworking members deserve, UPS will be striking itself,” Teamsters General President Sean O’Brien said in a prepared statement. “The strongest leverage our members have is their labor and they are prepared to withhold it to ensure UPS acts accordingly.”