The Hoops have won two of their last six games in the league as they look to secure a second consecutive Scottish Premier League title.
"I don't think we have been complacent," Lennon is quoted as saying by Sky Sports News. "I just think some players of late haven't been playing to the form that we know. There is certainly no lack of complacency.
"I'm just looking for a bit more quality from a few individuals. We have had a comfortable week training and are really looking forward to the game [against Hibernian on Saturday]."
Lennon's side will retain their SPL crown if they beat Hibs and St Mirren defeat Motherwell.