diff --git a/index.js b/index.js
index 58faf1e..654c971 100644
--- a/index.js
+++ b/index.js
@@ -3,6 +3,7 @@
 var fs = require('fs');
 var sqlite3 = require('./sqlite3-promises');
 var express = require('express');
+var cors = require('cors');
 
 const POLLING_TIMEOUT = 60000/*ms*/;
 
@@ -428,6 +429,8 @@ async function postGameHandler(req, res, next) {
 
 const app = express();
 
+app.use(cors());
+
 app.get('/pacosako/api/games/poll/:afterTime', catchExceptionsJson(getGameListHandler));
 app.get('/pacosako/api/games', catchExceptionsJson(getGameListHandler));
 
diff --git a/package-lock.json b/package-lock.json
index 5a8686c..bd43f66 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -210,6 +210,15 @@
       "resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.2.tgz",
       "integrity": "sha1-tf1UIgqivFq1eqtxQMlAdUUDwac="
     },
+    "cors": {
+      "version": "2.8.5",
+      "resolved": "https://registry.npmjs.org/cors/-/cors-2.8.5.tgz",
+      "integrity": "sha512-KIHbLJqu73RGr/hnbrO9uBeixNGuvSQjul/jdFvS/KFSIH1hWVd1ng7zOHx+YrEfInLG7q4n6GHQ9cDtxv/P6g==",
+      "requires": {
+        "object-assign": "^4",
+        "vary": "^1"
+      }
+    },
     "dashdash": {
       "version": "1.14.1",
       "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.1.tgz",
diff --git a/package.json b/package.json
index 22c97f2..a7bd511 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "description": "",
   "main": "index.js",
   "dependencies": {
+    "cors": "^2.8.5",
     "express": "^4.17.1",
     "sqlite3": "^4.1.1"
   },