The Serie A outfit took their chances in the first leg of their last-16 Champions League encounter at Parkhead, and raced to a 3-0 win thanks to goals from Alessandro Matri, Claudio Marchisio and Mirko Vucinic.
The Bhoys were unhappy with the Italians' physicality from set pieces, and Conte concedes that it was all part of the plan.
"We changed something compared to our usual defending, as they had scored 40% of their Champions League goals from corners and set pieces. We were only surprised once with a header over," Conte told Sky Sports News.
"We did pretty well defensively apart from at times in the first half when we went too deep. It was a good performance, we knew Celtic were a good side and they might not be mentioned among the top teams in Europe for many years, but they beat Barcelona and eliminated Benfica and Spartak Moscow.
"I think they were slightly surprised by Juventus, as they expected to get something more on home turf, but we prepared well in defence and attack. We had as much possession as they allowed us, because Celtic were going at 100mph and rested all their players at the weekend, whereas we faced Fiorentina on Saturday."
The return leg takes place in Turin on March 6.