Bemba, who served as vice-president from 2003 to 2006, had been jailed by the International Criminal Court over crimes committed by rebels under his command, but the court overturned his sentence in 2018.
The Democratic Republic of Congo is struggling to quell an armed rebellion by the M23 insurgency, which Kinshasa and several Western governments say is backed by neighbouring Rwanda.
Tshisekedi’s former chief of staff, Vital Kamerhe, was appointed as minister of economy, after he was sentenced to 20 years in prison for embezzlement before being acquitted last year.
The country is due to go to the polls in December.
Tshisekedi, who has been in power since January 2019, has said that he will run for re-election.
