DES MOINES (AP) — Dozens of teen killers serving mandatory life prison sentences in Iowa and Nebraska will get a chance to argue for their eventual freedom following a U.S. Supreme Court decision that it’s unconstitutional for state laws to require juveniles convicted of murder to be sentenced to life in prison without parole.

The court’s 5-4 ruling on Monday left open the possibility that judges could sentence juveniles to life terms in individual cases, but said state law cannot automatically impose such sentences.

In Iowa, there are 38 people serving life without parole for murders they committed as juveniles, The Des Moines Register reported.