The OCaml language has been open source since its inception. Originating at INRIA nearly three decades ago, the OCaml ecosystem has had contributors from diverse professional backgrounds and disciplines. A large number of OCaml projects are open-source, including the compiler itself, platform tooling, and associated libraries. Despite the existence of this extensive open-source ecosystem, the OCaml community adopted a Code of Conduct only three years ago. This presentation will detail the process of introducing this Code of Conduct: forming a team of volunteers, drafting the document, gathering community feedback, making amendments, and sharing the lessons learned.