diff --git a/lib/browser/api/app.js b/lib/browser/api/app.js
index a3d227b07961..80837501ecb4 100644
--- a/lib/browser/api/app.js
+++ b/lib/browser/api/app.js
@@ -24,15 +24,15 @@ Object.assign(app, {
     return Menu.getApplicationMenu()
   },
   commandLine: {
-    appendSwitch() {
-      let castedArgs = [...arguments].map((arg) => {
+    appendSwitch (...args) {
+      const castedArgs = args.map((arg) => {
         return typeof arg !== 'string' ? `${arg}` : arg
       })
 
       return binding.appendSwitch(...castedArgs)
     },
-    appendArgument() {
-      let castedArgs = [...arguments].map((arg) => {
+    appendArgument (...args) {
+      const castedArgs = [...arguments].map((arg) => {
         return typeof arg !== 'string' ? `${arg}` : arg
       })