In today’s fast-paced digital landscape, software updates are essential not only for enhancing features but also for securing systems against vulnerabilities. However, due to the complexity and constant evolution of software, deploying secure updates presents unique challenges. To tackle these, software manufacturers need a well-structured deployment program built on verified processes and thorough testing. This guide, developed by CISA and other leading agencies, highlights best practices to help manufacturers integrate secure deployment into their software development lifecycle.