---
title: "Requiring More Annotations to Functions and Classes in Flow"
short-title: "Functions and Classes Annotation Requirements"
authors: [sam-zhou]
medium-link: "https://medium.com/flow-type/requiring-more-annotations-to-functions-and-classes-in-flow-e8aa9b1d76bd"
---

:::info[Historical]
This post announced increased annotation requirements for functions and classes when it was introduced. For current syntax and behavior, see the [Annotation Requirement](/en/docs/lang/annotation-requirement) documentation.
:::

Flow will now require more annotations to functions and classes.
