---
header: Special Service Guide Update for January 31, 2023
lang: en
last_updated: null
url: https://docs.fastly.com/changes/significant/2023/01/31/special
---

As announced, today marks the start of the two-year support cycle for the Signal Sciences agent. Agent versions older than two years will be retired or deprecated on a quarterly cadence at the end of January, April, July, and October. Versions that are less than two years old are supported.