During October 2025, Jeroen Laanstra contributed to the microsoft/vcpkg repository by implementing security hardening for the Opus port on Windows. He enabled the STACK_PROTECTOR feature in the build system using CMake, which enhances protection against stack-based vulnerabilities across Windows toolchains. This change ensures that Windows builds of the Opus port benefit from improved stack overflow protection, directly addressing security and reliability concerns. Jeroen’s work focused on build systems and security, leveraging his expertise in CMake to deliver a targeted solution. The update was traceable through a dedicated commit, supporting both auditability and ongoing maintenance of the port.