diff --git a/composer.json b/composer.json
index de78868a..a6347856 100755
--- a/composer.json
+++ b/composer.json
@@ -59,7 +59,8 @@
         "erusev/parsedown": "~1.7.3",
         "erusev/parsedown-extra": "~0.7.1",
 
-        "bnf/slim3-psr15": "~1.1.1"
+        "bnf/slim3-psr15": "~1.1.1",
+        "tuupola/cors-middleware": "^1.1"
     },
     "suggest": {
         "ext-zend-opcache": "Recommended for better performance",
diff --git a/flextype/middlewares.php b/flextype/middlewares.php
index fd2887af..3d5f0f2a 100644
--- a/flextype/middlewares.php
+++ b/flextype/middlewares.php
@@ -9,7 +9,14 @@ declare(strict_types=1);
 
 namespace Flextype;
 
+use Tuupola\Middleware\CorsMiddleware;
+
 /**
  * Add middleware CSRF (cross-site request forgery) protection for all routes
  */
 $app->add($flextype->get('csrf'));
+
+/**
+ * Add middleware CorsMiddleware for Cross-origin resource sharing.
+ */
+$app->add(new CorsMiddleware);