diff --git a/app/FrontController.php b/app/FrontController.php
index 689025c..6142f2e 100644
--- a/app/FrontController.php
+++ b/app/FrontController.php
@@ -32,7 +32,6 @@ class FrontController
     private function __construct()
     {
         ErrorHandler::init();
-        Session::start();
         if (DEBUG == true) {
             Profiler::getInstance()->start();
         }
diff --git a/session/Session.php b/session/Session.php
index b658fd3..96546b2 100644
--- a/session/Session.php
+++ b/session/Session.php
@@ -42,6 +42,13 @@ class Session
      */
     public static function get($key = null, $default = null)
     {
+        if (!self::$started) {
+            if (self::isExists()) {
+                self::start();
+            } else {
+                return $default;
+            }
+        }
         if (null === $key) {
             return $_SESSION;
         }
@@ -57,6 +64,9 @@ class Session
      */
     public static function set($spec, $value = null)
     {
+        if (!self::$started) {
+            self::start();
+        }
         if (is_array($spec)) {
             foreach ($spec as $key => $value) {
                 self::set($key, $value);
@@ -73,6 +83,13 @@ class Session
      */
     public static function del($key)
     {
+        if (!self::$started) {
+            if (self::isExists()) {
+                self::start();
+            } else {
+                return;
+            }
+        }
         if (isset($_SESSION[$key])) {
             unset($_SESSION[$key]);
         }
@@ -141,7 +158,7 @@ class Session
 
     public static function isExists()
     {
-        if (ini_get('session.use_cookies') == '1' && isset($COOKIE[session_name()])) {
+        if (isset($_COOKIE[session_name()])) {
             return true;
         }
         return false;
@@ -149,6 +166,9 @@ class Session
 
     public static function start()
     {
+        if (self::$started) {
+            return;
+        }
         self::$started = true;
         session_start();
         self::regenerateId();
@@ -188,7 +208,7 @@ class Session
      */
     public static function expireSessionCookie()
     {
-        if (isset($COOKIE[session_name()])) {
+        if (isset($_COOKIE[session_name()])) {
             $params = session_get_cookie_params();
             setcookie(
                 session_name(),
@@ -200,4 +220,4 @@ class Session
             );
         }
     }
-}
\ No newline at end of file
+}