# Downgrade the ALEOS firmware for RV55 **URL:** \ **Category:** AirLink Routers\ **Created:** [December 5, 2023, 8:53am UTC](https://forum.sierrawireless.com/t/downgrade-the-aleos-firmware-for-rv55/31187 "2023-12-05T08:53:02Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![keysling](https://avatars.discourse-cdn.com/v4/letter/k/54ee81/32.png) [@keysling](https://forum.sierrawireless.com/u/keysling)\ **Post date:** [December 5, 2023, 8:53am UTC](https://forum.sierrawireless.com/t/downgrade-the-aleos-firmware-for-rv55/31187/1 "2023-12-05T08:53:02Z")
Hello, Is it possible to downgrade from ALEOS version 4.17 to 4.16? TIA ---
**Author:** ![jerdung](https://avatars.discourse-cdn.com/v4/letter/j/82dd89/32.png) [@jerdung](https://forum.sierrawireless.com/u/jerdung)\ **Post date:** [December 6, 2023, 2:27am UTC](https://forum.sierrawireless.com/t/downgrade-the-aleos-firmware-for-rv55/31187/2 "2023-12-06T02:27:37Z")
Hi @keysling, Yes, you can downgrade and please note that: If you need to downgrade a router, you must first perform a factory reset, then install the downgraded version and then perform a second factory reset. Please refer to the ALEOS 4.17.0 Release Notes at the following link: [https://source.sierrawireless.com/resources/airlink/software\_reference\_docs/release-notes/aleos-4,-d-,17,-d-,0-release-notes/#sthash.8uQz3dvF.dpbs](https://source.sierrawireless.com/resources/airlink/software_reference_docs/release-notes/aleos-4,-d-,17,-d-,0-release-notes/#sthash.8uQz3dvF.dpbs) Thanks, ---
**Author:** ![keysling](https://avatars.discourse-cdn.com/v4/letter/k/54ee81/32.png) [@keysling](https://forum.sierrawireless.com/u/keysling)\ **Post date:** [December 6, 2023, 2:35am UTC](https://forum.sierrawireless.com/t/downgrade-the-aleos-firmware-for-rv55/31187/3 "2023-12-06T02:35:16Z")
Ok, thanks for your support