diff --git a/.eslintrc.js b/.eslintrc.js
index 9eecfdb9f..60abf1402 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -5,12 +5,12 @@ module.exports = {
   "rules": {
     "func-names": "off",
     "global-require": "off", // Interfers with optional and eventual circular references
-
-    // doesn't work in node v4 :(
-    "strict": "off",
-    "prefer-rest-params": "off",
-    "react/require-extension": "off",
-    "import/no-extraneous-dependencies": "off"
+    "import/no-extraneous-dependencies": ["error", {"devDependencies": ["**/*.test.js",  "**/scripts/**", "**/tests/**"]}],
+    "react/require-extension": "off", // Forced by airbnb, not applicable (also deprecated)
+    "strict": ["error", "safe"], // airbnb implies we're transpiling with babel, we're not
+  },
+  "parserOptions": {
+    "sourceType": "script", // airbnb assumes ESM, while we're CJS
   },
   "env": {
     "mocha": true,
diff --git a/lib/plugins/aws/lib/getServiceState.js b/lib/plugins/aws/lib/getServiceState.js
index 0feefd37a..fe5b95b01 100644
--- a/lib/plugins/aws/lib/getServiceState.js
+++ b/lib/plugins/aws/lib/getServiceState.js
@@ -1,3 +1,5 @@
+'use strict';
+
 const path = require('path');
 
 module.exports = {
diff --git a/lib/utils/fs/readFileIfExists.js b/lib/utils/fs/readFileIfExists.js
index 4876033db..9c7fdd70e 100644
--- a/lib/utils/fs/readFileIfExists.js
+++ b/lib/utils/fs/readFileIfExists.js
@@ -1,3 +1,5 @@
+'use strict';
+
 const fileExists = require('./fileExists');
 const readFile = require('./readFile');
 const BbPromise = require('bluebird');
diff --git a/lib/utils/log/consoleLog.js b/lib/utils/log/consoleLog.js
index 2ba6c7017..4bbe99661 100644
--- a/lib/utils/log/consoleLog.js
+++ b/lib/utils/log/consoleLog.js
@@ -1,7 +1,7 @@
 'use strict';
 
-const consoleLog = function () {
-  console.log(arguments); // eslint-disable-line no-console
+const consoleLog = function (...args) {
+  console.log(args); // eslint-disable-line no-console
 };
 
 module.exports = consoleLog;
diff --git a/lib/utils/log/fileLog.js b/lib/utils/log/fileLog.js
index b8dd3549f..4b2c1f070 100644
--- a/lib/utils/log/fileLog.js
+++ b/lib/utils/log/fileLog.js
@@ -4,11 +4,10 @@ const _ = require('lodash');
 const fs = require('fs');
 const path = require('path');
 
-const fileLog = function () {
+const fileLog = function (...args) {
   // TODO BRN: This does not guarentee order, is not multi process safe,
   // TODO BRN: and is not guarenteed to complete before exit.
-  fs.appendFileSync(path.join(process.cwd(), 'sls.log'),
-    _.join(Array.prototype.slice.call(arguments)) + '\n'); // eslint-disable-line prefer-template
+  fs.appendFileSync(path.join(process.cwd(), 'sls.log'), `${_.join(args)}\n`);
 };
 
 module.exports = fileLog;
diff --git a/lib/utils/log/log.js b/lib/utils/log/log.js
index aa59e55ce..c9561f026 100644
--- a/lib/utils/log/log.js
+++ b/lib/utils/log/log.js
@@ -9,8 +9,8 @@ const loggers = [
   fileLog,
 ];
 
-const log = function () {
-  _.each(loggers, (logger) => logger.apply(null, arguments)); // eslint-disable-line prefer-spread
+const log = function (...args) {
+  _.each(loggers, (logger) => logger(...args));
 };
 
 module.exports = log;
diff --git a/lib/utils/renameService.js b/lib/utils/renameService.js
index ecb853c07..69dbd4fcf 100644
--- a/lib/utils/renameService.js
+++ b/lib/utils/renameService.js
@@ -1,3 +1,5 @@
+'use strict';
+
 const path = require('path');
 const fse = require('fs-extra');
 
diff --git a/lib/utils/sentry.js b/lib/utils/sentry.js
index 651a9302f..1a01325dc 100644
--- a/lib/utils/sentry.js
+++ b/lib/utils/sentry.js
@@ -1,3 +1,5 @@
+'use strict';
+
 const raven = require('raven');
 const ci = require('ci-info');
 const configUtils = require('./config');
diff --git a/lib/utils/userStats.js b/lib/utils/userStats.js
index 435d6a7f9..7700a9b75 100644
--- a/lib/utils/userStats.js
+++ b/lib/utils/userStats.js
@@ -13,8 +13,8 @@ const TRACK_URL = 'https://serverless.com/api/framework/track';
 const IDENTIFY_URL = 'https://serverless.com/api/framework/identify';
 const DEBUG = false;
 
-function debug() {
-  if (DEBUG) console.log(arguments);
+function debug(...args) {
+  if (DEBUG) console.log(args);
 }
 
 /* note tracking swallows errors */
diff --git a/tests/setupTests.js b/tests/setupTests.js
index 4da8b0798..01313fd46 100644
--- a/tests/setupTests.js
+++ b/tests/setupTests.js
@@ -1,3 +1,5 @@
+'use strict';
+
 // timeout is set to 5 minutes
 // eslint-disable-next-line no-undef
 jasmine.DEFAULT_TIMEOUT_INTERVAL = 300000;