1.13, also known as Update Aquatic, is an upcoming major update to Java Edition planned to be released in 2018. It will focus mainly on ocean content and technical features. This update was originally intended to be released as two separate updates with 1.13, originally named Technically Updated, having the technical changes and 1.14, originally named Update Aquatic, having all the ocean features. The update was originally revealed during the MineCon Earth livestream on November 18, 2017.
Initially, 1.13 was scheduled to be released on May 30, 2018. However, the release was later pushed back to an undetermined date to fix critical bugs.