As many as 225 people who protested against Nicolás Maduro’s contested election victory were set to be freed from Venezuelan prisons this weekend, according to a person familiar with the matter.

Dozens of people detained during protests over Venezuela’s disputed presidential election have been released, according to the local rights group Foro Penal.

It was the first major release of dissidents since the start of President Nicolás Maduro’s crackdown, which advocates say has been the worst in the country’s recent history.