Upgrading Rails at Scale by Edouard Chin Upgrading Rails at Shopify has always been a tedious and slow process. One full upgrade cycle was taking as much time as it takes to release a new Rails version. Having a full time dedicated team working solely on upgrading our platform wasn’t the solution but instead a proper process and toolkit. In this talk I’d like to share the different techniques and strategies that allowed to perform our smoothest and fastest Rails upgrade ever.