diff --git a/src/Settings.php b/src/Settings.php
index 69afd15..8345c1c 100644
--- a/src/Settings.php
+++ b/src/Settings.php
@@ -18,6 +18,7 @@ class Settings
     public $data = [];
     protected $file;
     protected $format = 'php';
+    protected $is_read = false;
 
     public function __construct ($file = null, $format = false)
     {
@@ -35,6 +36,7 @@ class Settings
     public function read()
     {
         if (!file_exists ($this->file)) {
+            $this->is_read = true;
             return false;
         }
         // Не include_once т.к читать настройки можно несколько раз
@@ -49,6 +51,7 @@ class Settings
             throw new Exception('no data in ' . $this->file);
         }
 
+        $this->is_read = true;
         $this->data = $settings;
         return true;
     }
@@ -165,6 +168,10 @@ class Settings
      */
     public function write($file = null)
     {
+        if (!$this->is_read) {
+            throw new Exception('read settings before write');
+        }
+
         if ($this->format == 'json') {
             $result = json_encode($this->data, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE);
         } else {