A couple of 14-year-old computer whizzes have the Bank of Montreal upgrading their security measures after they hacked an ATM machine. Matthew Hewlett and Caleb Turon, both Grade 9 students, found an old ATM operators manual online that showed how to get into the machine's operator mode. On Wednesday over their lunch hour, they went to the BMO's ATM at the Safeway on Grant Avenue to see if they could get into the system. "We thought it would be fun to try it, but we were not expecting it to work," Hewlett said. "When it did, it asked for a password." Hewlett and Turon were even more shocked when their first random guess at the six-digit password worked. They used a common default password. The boys then immediately went to the BMO Charleswood Centre branch on Grant Avenue to notify them.