Answer:
for USA, Canada and other countries running a 60 Hz supply service.
You will need to run a ground wire from the main breaker panel to the socket outlet.
If by some miracle there is a ground wire there already, you just need to replace the socket outlet.
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As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.