---
title: Environment variable limits increase for Workers Builds
description: Workers Builds now supports up to 64 environment variables per Worker with 5 KB per variable, up from a previous 5 KB total limit.
image: https://developers.cloudflare.com/changelog-preview.png
---

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## Environment variable limits increase for Workers Builds

Nov 21, 2025 

[ Workers ](https://developers.cloudflare.com/workers/) 

[Workers Builds](https://developers.cloudflare.com/workers/ci-cd/builds/) now supports up to 64 environment variables, and each environment variable can be up to 5 KB in size. The previous limit was 5 KB total across all environment variables.

This change enables better support for complex build configurations, larger application settings, and more flexible CI/CD workflows.

For more details, refer to the [build limits documentation](https://developers.cloudflare.com/workers/ci-cd/builds/limits-and-pricing/#definitions).