Mfrc522 @8 MHz

I am planning to use the Arduino platform with my custom board( based on Arduino UNO).In the application I will be using the mfrc522 RFID system with the Miguel library.However, to save pins & hardware, I want to use the internal 8MHz oscillator on the at328p.

Is it possible if I use the correct bootloader's for 8. 8MHz?Will I require any more changes for the library to work?