City won the Premier League title at a canter - with five games in the league to spare. But Guardiola wants more.
He knows that City must do better in the UEFA Champions League next season. They were knocked out in the quarter finals by Liverpool this time around. He is already plotting his squad for next season.
"Now is time to start to think about the squad," Guardiola said to Sky Sports.
"About the same people, new people. The same with the staff.
"We have to change a few things to make a step forward and that is the challenge.
"We have one year to defend our title.
"I am sure the other teams are preparing better to beat us because we are the champions and If we stop then they are going to catch us.
"We have an amazing group of guys but you can lose it. I don't know how we are going to react after winning the Premier League, even myself.
"Football changes in nothing. In the next five minutes we are going to see how we react to the success. It is a good test for all of us."