Migration Notes - afred/hydra-head GitHub Wiki Migrating to 6.0 Migrating to 5.0 Migrating to 4.0 https://github.com/projecthydra/hydra-head/wiki/Upgrade-guide-from-Rails-2-(HydraHead-2.x)-to-Rails-3 ⚠️ **GitHub.com Fallback** ⚠️