He was sentenced to three years and six months in closed juvenile detention, an increase of six months from the district court's sentence.
The boy, who was 15 years old at the time of the incident, admitted to carrying out the shooting after accepting a murder-for-hire assignment for payment from unknown individuals via an online chat.
The prosecutor also requested deportation, but the Court of Appeal rejected it.
"The boy has lived in Sweden with his family since he was three years old; he has no ties to his country of citizenship and he has never previously been convicted of or suspected of a crime," said Court of Appeal Councilor Camilla Ulvenfalk in a comment.
The court also sentenced a then 17-year-old boy for aiding and abetting murder to four years in a closed juvenile facility.
By all accounts, the murdered man was not the intended target. He had come to Sweden from Egypt just a couple of months earlier to work.
