ERR! 426 Upgrade Required, when I interact with the npm registry

Question

When I try to publish a new package to npm or try to logout, I get the following error message:

npm ERR! code E426
npm ERR! 426 Upgrade Required

Answer 1

Beginning October 4, 2021, all connections to npm websites and the npm registry—including for package installation—must use TLS 1.2 or higher.

Source

What I did:

• upgrade Node (0) to its current recommended version: 14.18.0 LTS
• upgrade npm with npm install -g npm@latest

Other causes: I had to manually set the registry to use https instead of http as well:

• npm config set registry https://registry.npmjs.org/

---

(0) When using nvm, that's what you need to do:

nvm install 14.18.0
nvm use 14.18.0
nvm alias default 14.18.0

Answer 2

setting npm config set registry https://registry.npmjs.org/ worked for me using npm v8