Former U.S. Rep. Anthony Weiner, D-New York, “deserves time in prison” for his conviction of sending obscene material to a minor, prosecutors argued in papers filed Wednesday, in which they urge a federal judge to stick with the government’s proposed sentence of 21 to 27 months.

Weiner, who also made a failed bid for New York City mayor in 2013, is scheduled on Sept. 25 to appear for sentencing before U.S. District Judge Denise Cote of the Southern District of New York.