---
title: Environment variable limits increase for Workers Builds · Changelog
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.
chatbotDeprioritize: true
source_url:
  html: https://developers.cloudflare.com/changelog/2025-11-21-builds-env-var-increase/
  md: https://developers.cloudflare.com/changelog/2025-11-21-builds-env-var-increase/index.md
---

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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/#environment-variable-limits).
