Jackett's admission comes after it was revealed that goalkeeper Dorus de Vries could leave for an unnamed Dutch club on a free transfer, but the former Millwall boss has insisted that he is happy to have Wayne Hennessey, Carl Ikeme and Aaron McCarey competing for a place in the starting lineup.
The 51-year-old told the Express & Star: "There's some competition, which is good for me, but for Aaron to get called up by the full Irish squad is good for him and the club.
"It's been a good, positive period for him on a personal level. And it's good to see Wayne and Carl after their injuries both looking OK."
De Vries has made 15 league appearances during his two years at the club.