North Korea's ruling party says it will hold its biggest convention in decades next May.

The Workers' Party said Friday its 7th congress will be convened as it's faced with "the heavy yet sacred task" of build a thriving nation. But it didn't elaborate on what the party's highest-level body will determine.

Seoul analysts say North Korean leader Kim Jong Un will likely use the congress to reshuffle party officials and present major state policies.

Since taking power upon the death of his dictator father in late 2011, Kim is struggling to revive his country's moribund economy and grappling with an international standoff over the North's nuclear and missile programs. The Workers' Party last held its congress in 1980.