old_contents: 'use strict';
  
  var https = require('https');
  
  /**
   * Checks SSL Expiry date
   * @param {string} host
   * @param {string} method
   * @param {number} port
   * @return {object}
   */
  module.exports = (host, method, port) => {
  	if (!host) throw new Error("Invalid host");
  
  	const options = {
  		host: host,
  		method: method || 'HEAD',
  		port: port || 443
  	};
  
  	let numericPort = (!isNaN(parseFloat(options.port)) && isFinite(options.port));
  	if (numericPort === false) throw new Error("Invalid port");
  	let daysBetween = (from, to) => Math.round(Math.abs((+from) - (+to))/8.64e7);
  
  	if (options.host === null || options.port === null) throw new Error("Invalid host or port");
  	try {
  		return new Promise(function(resolve, reject) {
  			const req = https.request(options, res => {
  				let { valid_from, valid_to } = res.connection.getPeerCertificate();
  				resolve({
  					valid_from: valid_from,
  					valid_to: valid_to,
  					days_remaining: daysBetween(new Date(), new Date(valid_to))
  				});
  			});
  			req.on('error', (e) => { reject(e) });
  			req.end();
  		}).catch(console.error);
  
  	} catch (e) {
  		throw new Error(e)
  	}
  };
  
new_contents: 'use strict';
  
  var https = require('https');
  
  /**
   * Checks SSL Expiry date
   * @param {string} host
   * @param {string} method
   * @param {number} port
   * @return {object}
   */
  module.exports = (host, method, port) => {
  	if (!host) throw new Error("Invalid host");
  
  	const options = {
  		host: host,
  		method: method || 'HEAD',
  		port: port || 443,
  		rejectUnauthorized: false
  	};
  
  	let numericPort = (!isNaN(parseFloat(options.port)) && isFinite(options.port));
  	if (numericPort === false) throw new Error("Invalid port");
  	let daysBetween = (from, to) => Math.round(Math.abs((+from) - (+to))/8.64e7);
  
  	if (options.host === null || options.port === null) throw new Error("Invalid host or port");
  	try {
  		return new Promise(function(resolve, reject) {
  			const req = https.request(options, res => {
  				let { valid_from, valid_to } = res.connection.getPeerCertificate();
  				resolve({
  					valid_from: valid_from,
  					valid_to: valid_to,
  					days_remaining: daysBetween(new Date(), new Date(valid_to))
  				});
  			});
  			req.on('error', (e) => { reject(e) });
  			req.end();
  		}).catch(console.error);
  
  	} catch (e) {
  		throw new Error(e)
  	}
  };
  
subject: Add rejectUnauthorized = false property in https-request