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openclaw - 💡(How to fix) Fix Deprecation Warning: punycode module is deprecated (DEP0040) [1 participants]

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openclaw/openclaw#62034•Fetched 2026-04-08 03:10:00
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OpenClaw 2026.4.5 triggers Node.js deprecation warning for the punycode module.

Root Cause

The warning originates from the bundled tough-cookie module in dist/dist-B-VOQ5SS.js. The punycode module is deprecated since Node.js v21 and will be removed in future versions.

Code Example

(node:XXXX) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.
RAW_BUFFERClick to expand / collapse

Description

OpenClaw 2026.4.5 triggers Node.js deprecation warning for the punycode module.

Warning Message

(node:XXXX) [DEP0040] DeprecationWarning: The `punycode` module is deprecated. Please use a userland alternative instead.

Environment

  • OpenClaw version: 2026.4.5
  • Node.js version: v22.22.1
  • OS: Linux x64

Root Cause

The warning originates from the bundled tough-cookie module in dist/dist-B-VOQ5SS.js. The punycode module is deprecated since Node.js v21 and will be removed in future versions.

Suggested Fix

  1. Upgrade tough-cookie to latest version (6.0.1)
  2. Or ensure the bundled code uses punycode.js (userland alternative) instead of Node.js built-in punycode

Impact

  • Current: Warning only, no functional impact
  • Future: May break when Node.js removes the built-in punycode module

extent analysis

TL;DR

Upgrade the tough-cookie module to the latest version (6.0.1) to address the Node.js deprecation warning for the punycode module.

Guidance

  • Verify the current version of tough-cookie used by OpenClaw to confirm it's outdated.
  • Check the OpenClaw documentation or repository for guidance on updating bundled modules like tough-cookie.
  • Consider using a userland alternative like punycode.js if updating tough-cookie is not feasible.
  • Monitor Node.js releases for the removal of the built-in punycode module to anticipate future breaks.

Example

No explicit code example is provided as the fix involves updating a module version rather than modifying code directly.

Notes

The provided solution assumes that OpenClaw allows for the update of bundled modules like tough-cookie. If OpenClaw does not support this, alternative solutions may need to be explored.

Recommendation

Apply the workaround by upgrading tough-cookie to the latest version (6.0.1), as this directly addresses the deprecation warning and prepares the application for future Node.js versions where the built-in punycode module will be removed.

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