arXiv received $322,000 from the Heising-Simons Foundation to contribute to the arXiv-NG initiative, which aims to modernize arXiv's infrastructure and consider new models for the service’s sustainability. The grant from the Heising-Simons Foundation, which follows a $450,000 grant from the Sloan Foundation, will help fund the creation of a scalable, cost-efficient, and reliable infrastructure for the site, which currently relies on aging legacy code. The arXiv-NG initiative, which began in January 2017, is expected to take 2-3 years, during which time the site will remain robust and reliable.