Solving HTTP/1.0 issues

Reviewed on August 25, 2025

Problem

I get an HTTP 426 Upgrade Required error while using Serverless Functions.

Cause

Scaleway Serverless Functions only supports HTTP/1.1 and HTTP/2. Other protocols are not compatible.

Solutions

• Send HTTP/1.1 requests if you have control over the protocol to use when calling a Serverless Function.
• Deploy a layer in front of your function to translate HTTP/1.0 into HTTP/1.1.