The evolution of global industries to Industry 4.0 (Rev 4.0) is both exciting and scary. Industry 4.0 is the designated code name for a combination of traditional manufacturing practices and industrial processes with technological capabilities, from automation to AI. Whilst there are many benefits of Industry 4.0, there are several key challenges that lie ahead. Having everything attached to everything else in the Internet of things (IoT) is going to monumentally increase the vulnerabilities present in any given network. With more nodes, connections and burden of connectivity, systems are going to have to be more secure. Rev 4.0 will usher in more calls for greater cybersecurity.