The left-back has been sidelined for three weeks with a knee injury after a training-ground collision with goalkeeper Wojciech Szczesny.
Dickson has only missed one game as Brentford's last two matches were postponed, and he was due to resume full training on Thursday.
Midfielder Marcus Bean is fully fit after recovering from a knee injury and could return to the starting line-up.
Ben Strevens and Charlie MacDonald look set to start in attack after young striker John Akinde returned to Bristol City after an unsuccessful loan spell.
Goalkeeper Nikki Bull remains the only long-term absentee as he continues his recovery from last year's shoulder operation.