A tampered release of Monero could have catastrophic consequences. Widespread methods to secure releases, like publishing a signed checksum of the binary, do not offer protection against rollback attacks, the maintainer releasing a binary containing malicious code, or users not checking signatures. I will present an introduction to reproducible builds, cross platform toolchains, update systems and user-friendly verification methods to ensure binary integrity. Sebastian is a physics student at the university of Zurich, and works for a hardware wallet company. He contributes to various cryptocurrency related projects.