A 19-year-old pro-democracy activist in Bangkok was sentenced on Thursday to one year in jail for wearing a crop top in 2020—or rather, for poking fun at Thailand’s eminently mockworthy yet notoriously unmockable King Maha Vajiralongkorn, in part by wearing a crop top. The teenager, identified by the pseudonym Sainam, is one of at least 253 people, including minors as young as 15, who have been charged in the last three years with violating Section 112 of the country’s criminal code, which punishes criticisms of the monarchy with up to 15 years behind bars and which, rights groups say, has been systematically used to quell political dissent. [time-brightcove not-tgx=”true”] “Sainam’s case,” Akarachai Chaimaneekarakate—an advocacy associate at Thai Lawyers for Human Rights, which tracks and assists those facing political persecution—tells TIME, “is yet another piece of evidence that points towards the shrinking of civic space in Thailand.” The latest sentencing also comes as hopes for an end to the sweeping royal defamation prosecutions are quickly fading. Thailand’s royal family has faced increasing public criticism in recent years, most notably in the form of pro-democracy protests that rocked the country in 2020 and 2021.