Leicester have registered just one point from their last three games in the top flight, with their last fixture ending in a 5-1 defeat at Manchester City.
The Foxes now sit in eighth position - with seventh place being required to potentially qualify for the Europa League - and Puel has revealed that he has been disappointed with his side's efforts in their most recent outings.
At a press conference, the 56-year-old told reporters: "I think it is important to continue our work, to continue good results. Last time our result was not enough.
"It is important to come back with a good attitude and conviction because I think we lost a lot of points in the last games."
On the club's fight for a European spot, the Frenchman added: "It will be tough because all the other teams want the same thing but it is an exciting challenge."
Leicester returned to winning ways last Friday with a 1-0 victory over Sheffield United in the FA Cup.