diff --git a/src/flextype/app/Foundation/Flextype.php b/src/flextype/app/Foundation/Flextype.php
new file mode 100644
index 00000000..93b4b502
--- /dev/null
+++ b/src/flextype/app/Foundation/Flextype.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Flextype (https://flextype.org)
+ * Founded by Sergey Romanenko and maintained by Flextype Community.
+ */
+
+namespace Flextype\App\Foundation;
+
+use Slim\App;
+
+class Flextype extends App
+{
+    /**
+     * Flextype version
+     *
+     * @var string
+     */
+    const FLEXTYPE_VERSION = '0.9.0';
+
+    private $instance;
+
+    private $flextype;
+
+    public function __construct($flextype = [])
+    {
+        parent::__construct($flextype);
+        $this->instance  = $this;
+        $this->container = $this->instance->getContainer();
+    }
+
+    public function container($key = null)
+    {
+        if ($key != null) {
+            return $this->container[$key];
+        }
+
+        return $this->container;
+    }
+
+    public function getInstance()
+    {
+        return $this->instance;
+    }
+}
diff --git a/src/flextype/bootstrap.php b/src/flextype/bootstrap.php
index af1212a8..481ef377 100755
--- a/src/flextype/bootstrap.php
+++ b/src/flextype/bootstrap.php
@@ -11,7 +11,7 @@ namespace Flextype;
 
 use Flextype\Component\Registry\Registry;
 use Flextype\Component\Session\Session;
-use Slim\App;
+use Flextype\App\Foundation\Flextype;
 use Zeuxisoo\Whoops\Provider\Slim\WhoopsMiddleware;
 use function date_default_timezone_set;
 use function error_reporting;
@@ -36,40 +36,6 @@ $registry = new Registry();
  */
 include_once ROOT_DIR . '/src/flextype/preflight.php';
 
-class Flextype extends App
-{
-    /**
-     * Flextype version
-     *
-     * @var string
-     */
-    const FLEXTYPE_VERSION = '0.9.0';
-
-    public $instance;
-    public $flextype;
-
-    public function __construct($flextype = [])
-    {
-        parent::__construct($flextype);
-        $this->instance  = $this;
-        $this->container = $this->instance->getContainer();
-    }
-
-    public function container($key = null)
-    {
-        if ($key != null) {
-            return $this->container[$key];
-        }
-
-        return $this->container;
-    }
-
-    public function getInstance()
-    {
-        return $this->instance;
-    }
-}
-
 /**
  * Create new application
  */