diff --git a/app/models/event-invoice.js b/app/models/event-invoice.js
index ed457e30500..5a6f3a05d13 100644
--- a/app/models/event-invoice.js
+++ b/app/models/event-invoice.js
@@ -19,8 +19,8 @@ export default ModelBase.extend({
   paymentMode   : attr('string'),
   stripeToken   : attr('string'),
   last4         : attr('string'),
-  expMonth     	: attr('number'),
-  expYear      	: attr('number'),
+  expMonth      : attr('number'),
+  expYear       : attr('number'),
   amount        : attr('number'),
   completedAt   : attr('moment'),
   invoicePdfUrl : attr('string'),
diff --git a/config/deploy.js b/config/deploy.js
index 570a38e7196..262705fa059 100644
--- a/config/deploy.js
+++ b/config/deploy.js
@@ -1,7 +1,7 @@
 /* jshint node: true */
 
 module.exports = function(deployTarget) {
-  let ENV = {
+  const ENV = {
     build: {}
     // include other plugin configuration that applies to all deploy targets here
   };
diff --git a/config/deprecation-workflow.js b/config/deprecation-workflow.js
index a8d84b10995..1bec3219d30 100644
--- a/config/deprecation-workflow.js
+++ b/config/deprecation-workflow.js
@@ -1,3 +1,5 @@
+/* eslint-env browser */
+
 window.deprecationWorkflow = window.deprecationWorkflow || {};
 window.deprecationWorkflow.config = {
   workflow: [
diff --git a/config/environment.js b/config/environment.js
index 889d519043c..39634a84393 100644
--- a/config/environment.js
+++ b/config/environment.js
@@ -9,7 +9,7 @@ function getSentryServer(dsn, withProtocol = true) {
 
 
 module.exports = function(environment) {
-  let ENV = {
+  const ENV = {
     appName                  : process.env.APP_NAME || 'Open Event',
     modulePrefix             : 'open-event-frontend',
     environment,
@@ -55,11 +55,11 @@ module.exports = function(environment) {
     },
 
     sentry: {
-      dsn         : process.env.SENTRY_DSN || 'https://dummy@getsentry.com/dummy',
-      debug       : !!process.env.SENTRY_DSN,
-      development : !process.env.SENTRY_DSN,
-      release     : (process.env.SENTRY_PROJECT_NAME || 'eventyay-frontend') + '@' + process.env.npm_package_version,
-      tracesSampleRate: process.env.SENTRY_TRACE_SAMPLE_RATE || 0.1,
+      dsn              : process.env.SENTRY_DSN || 'https://dummy@getsentry.com/dummy',
+      debug            : !!process.env.SENTRY_DSN,
+      development      : !process.env.SENTRY_DSN,
+      release          : (process.env.SENTRY_PROJECT_NAME || 'eventyay-frontend') + '@' + process.env.npm_package_version,
+      tracesSampleRate : process.env.SENTRY_TRACE_SAMPLE_RATE || 0.1
     },
 
     emberFullCalendar: {
@@ -87,11 +87,11 @@ module.exports = function(environment) {
   };
 
   ENV['ember-simple-auth-token'] = {
-    refreshAccessTokens : false,
-    serverTokenEndpoint : `${ENV.APP.apiHost}/auth/session`,
-    tokenPropertyName : 'access_token',
-    authorizationPrefix : 'JWT ',
-    authorizationHeaderName: 'Authorization'
+    refreshAccessTokens     : false,
+    serverTokenEndpoint     : `${ENV.APP.apiHost}/auth/session`,
+    tokenPropertyName       : 'access_token',
+    authorizationPrefix     : 'JWT ',
+    authorizationHeaderName : 'Authorization'
   };
 
   ENV['g-map'] = {
diff --git a/package.json b/package.json
index d009d4dadd1..c5892428047 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "test": "ember test",
     "exam": "ember exam --launch=chrome --random",
     "lint": "npm-run-all --aggregate-output --continue-on-error --parallel lint:*",
-    "lint:js": "eslint --fix app ember-cli-build.js testem.js tests",
+    "lint:js": "eslint --fix app ember-cli-build.js testem.js tests config",
     "lint:scss": "sass-lint -c .sass-lint.yml --verbose",
     "lint:hbs": "ember-template-lint ."
   },