once.diff

diff --git a/src/services/gapi.js b/src/services/gapi.js
index 1be368d..345ad9f 100644
--- a/src/services/gapi.js
+++ b/src/services/gapi.js
@@ -3,13 +3,11 @@ import $S from 'scriptjs';
 import once from 'lodash/once';
 import config from '../config';
 
-export async function initGapi() {
-  return new Promise((resolve) => {
-    $S('https://apis.google.com/js/client.js', () => {
-      resolve(gapi);
-    });
+export const initGapi = once(async() => new Promise((resolve) => {
+  $S('https://apis.google.com/js/client.js', () => {
+    resolve(gapi);
   });
-}
+}));
 
 export async function initGapiClient(gapi) {
   const client = await new Promise((resolve, reject) => {