diff --git a/packages/resource/index.js b/packages/resource/index.js
index 6793c28..9b8b07b 100644
--- a/packages/resource/index.js
+++ b/packages/resource/index.js
@@ -14,17 +14,19 @@ export class Resource {
       this.loadCache = {};
     }
     if (this.loadCache[uri]) {
-      return Promise.resolve(JSON.parse(JSON.stringify(this.loadCache[uri])));
+      return this.loadCache[uri].then((json) => {
+        return JSON.parse(JSON.stringify(json));
+      });
     }
     if ('undefined' !== typeof window) {
-      return fetch(uri).then((response) => {
+      return this.loadCache[uri] = fetch(uri).then((response) => {
         return response.json();
       }).then((json) => {
-        return this.loadCache[uri] = json;
+        return json;
       });
     }
     else {
-      return new Promise((resolve, reject) => {
+      return this.loadCache[uri] = new Promise((resolve, reject) => {
         const fs = require('fs');
         const path = require('path');
         const resourcePath = path.resolve(process.cwd(), 'resource');
@@ -32,7 +34,7 @@ export class Resource {
           if (error) {
             return reject(error);
           }
-          resolve(this.loadCache[uri] = JSON.parse(buffer.toString('utf8')));
+          resolve(JSON.parse(buffer.toString('utf8')));
         });
       });
     }