Blanc has the enviable financial support of the club's owners in the transfer market and has refused to completely rule out more signings.
When asked about further recruitments this summer Blanc said: "New reinforcements? I don't know for sure.
"If some players leave, some others could arrive."
Blanc's comments come after a summer of high-profile signings with Edinson Cavani joining from Napoli and Marquinhos moving to the French capital from Roma.
The question over new faces has been raised in a period where star striker Zlatan Ibrahimovic has struggled for form, but Blanc believes he will be scoring goals again soon.
And he added that the Sweden international will form a good partnership with Uruguay forward Cavani.
He added: "Ibra? He will score again. He gets opportunities. Let him get back to his best fitness and form and he will score again.
"Cavani is a boy that scores goals and defends. With Ibra he will have a very good relationship."