Olivier Echouafni's side recorded a 3-0 win in Sunday's league game.
After Lyon had run riot in Marseille on Saturday, the Rouge et Bleu needed all three points to keep pace with their fellow title-chasers.
Mission accomplished, thanks in large part to Nadim, who gave the Parisians an early lead (0-1, 8'). The visitors then took a firm grip on the game with Geyoro (0-2, 41') and Katoto (0-3, 42') scoring in quick succession before the break.
Next up, a Coupe de France quarter-final at Arras next Saturday.
SOYAUX - PARIS SAINT-GERMAIN: 0-3 (0-3)
D1 Arkema - Round 15
Stade Camille Lebon (Angoulême)
Goals: Nadim (8'), Geyoro (41'), Katoto (42')
SOYAUX: Munich ; Cissoko, M'Bassidje, Rougé, Boudaud ; Tandia (c) (Pingeon, 74') ; Canon (Bourgouin, 60'), Da Costa (Lahmari, 46'), Clérac, Dumont ; Cambot. Coach: Sébastien Joseph.
PARIS SAINT-GERMAIN: Endler ; Périsset, Paredes (c), Dudek, Morroni ; Geyoro, Formiga ; Diani, Nadim (Khelifi, 74'), Baltimore (Saevik, 82') ; Katoto. Coach: Olivier Echouafni.