It is a simple change. You will need the new crank and compatible bb cups. Your frame is English/ISO threaded so installing the cups will be no problem.

You will have to raise your front derailleur to clear the larger big chainring and check to be sure your chain is still long enough to allow shifting into big-big. The increase in minimum chain length will be 2 half-links (1") and you may aleady have that much slack but be sure.