npm WARN deprecated package@1.2.3: This package is no longer supported.
A dependency (often a transitive one) is deprecated by its author.
Seen on:
npm
Meaning
Warnings, not errors. Many come from deep dependencies you don’t control (glob, inflight, rimraf). Upgrade direct dependencies to pull in newer versions.
Common causes
- Old direct dependency
- Transitive dependency of an outdated package
- Package abandoned by its maintainer
⚡ Quick fix
- Find who pulls it in: npm ls package
- Upgrade the parent package
- Use overrides only when safe
Detailed fix by platform
npm
npm ls inflight
How to diagnose
- Source — Direct or transitive?
- Recent change — Did it start after a deploy, upgrade, or configuration change? Compare with the last working version.
🧠 Still stuck? Analyze your error
Paste the full message, response headers or stack trace — we'll detect the platform and point to the most likely cause.
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Last updated 2 Oct 2026