The Eastern Cluster of Lutheran Seminaries (Lutheran Theological Southern Seminary and United Lutheran Seminary) have had a joint library catalog between their three libraries for over 18 years that allowed for inter-institutional lending, some shared purchases, and joint collection development. After using a shared instance of Voyager for 17 years, the Cluster knew it was time to upgrade. During the 2018-2019 school year, the Cluster researched alternative software and ultimately selected the open source tool Koha, hosted by Equinox Open Library Initiative. This session will go over the reasons for change, the selection process, preparing for install, the install process, lessons learned, and the main benefits of a joint catalog.