UNABLE_TO_VERIFY_LEAF_SIGNATURE error during npm install chai

[sumanmathad]

Hi,

I am behind a corporate proxy and am getting below error when I try to install chai. is there a known solution without touching the proxy settings?

npm install chai
npm ERR! code UNABLE_TO_VERIFY_LEAF_SIGNATURE
npm ERR! errno UNABLE_TO_VERIFY_LEAF_SIGNATURE
npm ERR! request to https://registry.npmjs.org/chai failed, reason: unable to verify the first certificate