About deply rails and modify nodejs version

[unixc3t]

my rails app use the javascript es6 syntax, i found default install nodejs v6 ,

I saw your doc , the url is https://devcenter.heroku.com/articles/ruby-support#installed-binaries

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Once you have done this you’ll need a package.json file in the root of your app. For example to install version 6.2.2 your package.json could look like this: { "engines" : { "node": "6.2.2" } }

Commit to git:

$ git add pacakage.json

$ git commit -m 'specify node version'

Now the next time you deploy your Ruby application will use Node version 6.2.2.

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I modiy package.json file with

{ "name": "shopa", "private": true, "dependencies": {}, "engines": { "node": "8.5.0" } }

but i push it , it still nodejs v6

because I am a free user? I can't modify nodejs version?

[jdx]

you should submit a support ticket, this is a project for the Heroku CLI only