Crossref is a not-for-profit membership organization for scholarly publishing working to make content easy to find, cite, link, and assess. Crossref provides services for the publishing community such as Content Registration with Digital Object Identifiers (DOIs) and funding data, Cited-by linking, Similarity Check for editorial originality and Crossmark for updates and retractions. Crossref has continued to grow since it was founded in 2000, and now works with over 7,000 members around the world. From these members, Crossref has indexed 87 million metadata records, and makes them available through Application Programming Interfaces (APIs) and search services, so that the content that Crossref members publish can be discovered and linked to as widely as possible. Along with the development of these services, Crossref has been working with the Public Knowledge Project (PKP) to help organizations who use OJS deposit DOIs and ORCID iDs and participate in other services like Similarity Check. Crossref and PKP aim to continue this collaboration in 2017 to develop the OJS / Crossref plugin so that it can support more Crossref services such as reference linking, funding data, Cited-by linking and Crossmark. This will benefit Crossref members, but also the wider research community including researchers, funders, libraries and service providers who use Crossref metadata to find content. This proposal will cover an update on Crossref services, the OJS / Crossref plugin and the planned developments to the Crossref members plugin. DOI: 10.18225/SISPUBISISPUB.23