var jsonfile = require("jsonfile"); var semver = require("semver"); var file = "../src/imagesharp/project.json"; var semversion = semver.valid(process.env.mssemver); jsonfile.readFile(file, function (err, project) { project.version = semversion; jsonfile.writeFile(file, project, {spaces: 2}, function(err) { console.error(err); }); })