On May 7, a pipeline system carrying almost half the fuel used on the east coast of the United States was crippled by a major cyber attacks. The five-day shutdown of the Colonial Pipeline resulted in widespread fuel shortages and panic-buying as Virginia, North Carolina and Florida declared a state of emergency. The attack highlights how vulnerable critical infrastructure such as fuel pipelines are in an era of growing cyber security threats. In Australia, we believe the time has come to make it compulsory for critical infrastructure companies to implement serious cyber security measures.