During January 2026, Exa Exa upgraded the SBML library dependency in the JuliaPackaging/Yggdrasil repository, updating libsbml from version 5.20.1 to 5.21.0. This work focused on aligning the package with upstream changes, ensuring downstream Julia modeling workflows could access the latest SBML features and fixes. Exa applied skills in dependency management, version control, and package management to coordinate the update, carefully pinning versions to maintain build reliability and compatibility. While no major bugs were addressed during this period, the targeted upgrade improved stability for users relying on SBML, reflecting a precise and methodical approach to package maintenance.