Injuries to key players such as Randall Cobb, James Jones, Clay Matthews and Nick Perry have left the Packers short of players at receiver and linebacker for their clash with the AFC North side on Sunday.
"Really, that's where we are," McCarthy told the Milwaukee Journal Sentinel.
"We've been planning all week. When you get in these types of situations you plan for every scenario. We'll be ready to go Sunday, I promise you that."
The Packers are 3-2 in their season going into week seven.