Hearn recently rewarded manager Russell Slade for guiding the Os to two seventh-placed finishes in three seasons with a two-year contract extension.
And Hearn is backing Slade to mount a genuine bid to reach the Championship next term.
"Finishing seventh two years out of three, I think we would normally bite peoples arms off at that, so we're now getting a bit ambitious," he told the club website.
"We're now thinking `okay that's great but what's the next level?' The next level is to try and get into the Championship and that's what we're going to try and do this year."
- Sports & Recreation
- Russell Slade