From London to Lagos, from New York to New Delhi – modern cities are built on a dense jungle of wires and cables that form the indispensable infrastructures of our city life. Information and Communication Technology are the artery system that helps fuel economic growth, and makes cities more ‘smart’ and livable. But this has also created new vulnerabilities. ICT failure can easily send a cascade of effects throughout our economy and society. The complexity of our cities makes it impossible to fully eliminate such threats. We can, however, develop strategies aimed at rapidly bouncing back when threats materialize. This Issue Brief elaborates on how cyber resilience strategies can help cities deal with risks in a hyper-connected world.