diff --git a/src/api.php b/src/api.php
index f0430d7..d803212 100644
--- a/src/api.php
+++ b/src/api.php
@@ -184,67 +184,3 @@ function haveWriteAccess(?int $listId = null) : bool
     }
     return true;
 }
-
-
-class ApiRequest
-{
-    public $path;
-    public $method;
-    public $contentType;
-    public $jsonBody;
-
-    function __construct() {
-        $this->path = $_SERVER['PATH_INFO'] ?? '';
-        $this->method = isset($_SERVER['REQUEST_METHOD']) ? strtoupper($_SERVER['REQUEST_METHOD']) : 'GET';
-        $this->contentType = $_SERVER['CONTENT_TYPE'] ?? '';
-    }
-
-    function decodeJsonBody() {
-        $this->jsonBody = json_decode( file_get_contents('php://input'), true, 10, JSON_INVALID_UTF8_SUBSTITUTE );
-        return $this->jsonBody;
-    }
-}
-
-class ApiResponse
-{
-    public $data = null;
-    public $contentType = 'application/json';
-    public $code = null;
-
-    function htmlContent(string $content, int $code = 200): ApiResponse
-    {
-        $this->contentType = 'text/html';
-        $this->data = $content;
-        $this->code = $code;
-        return $this;
-    }
-
-    function  exit()
-    {
-        if (is_null($this->data) && is_null($this->code)) {
-            http_response_code(404);
-        }
-        if (!is_null($this->code)) {
-            http_response_code($this->code);
-        }
-        if ($this->contentType == 'text/html') {
-            print $this->data;
-            exit();
-        }
-        jsonExit($this->data);
-    }
-}
-
-abstract class ApiController
-{
-    /** @var ApiRequest */
-    protected $req;
-
-    /** @var ApiResponse */
-    protected $response;
-
-    function __construct(ApiRequest $req, ApiResponse $response) {
-        $this->req = $req;
-        $this->response = $response;
-    }
-}
diff --git a/src/includes/common_classes.php b/src/includes/common_classes.php
new file mode 100644
index 0000000..5fb36dd
--- /dev/null
+++ b/src/includes/common_classes.php
@@ -0,0 +1,70 @@
+<?php declare(strict_types=1);
+
+/*
+    This file is a part of myTinyTodo.
+    (C) Copyright 2022 Max Pozdeev <maxpozdeev@gmail.com>
+    Licensed under the GNU GPL version 2 or any later. See file COPYRIGHT for details.
+*/
+
+class ApiRequest
+{
+    public $path;
+    public $method;
+    public $contentType;
+    public $jsonBody;
+
+    function __construct() {
+        $this->path = $_SERVER['PATH_INFO'] ?? '';
+        $this->method = isset($_SERVER['REQUEST_METHOD']) ? strtoupper($_SERVER['REQUEST_METHOD']) : 'GET';
+        $this->contentType = $_SERVER['CONTENT_TYPE'] ?? '';
+    }
+
+    function decodeJsonBody() {
+        $this->jsonBody = json_decode( file_get_contents('php://input'), true, 10, JSON_INVALID_UTF8_SUBSTITUTE );
+        return $this->jsonBody;
+    }
+}
+
+class ApiResponse
+{
+    public $data = null;
+    public $contentType = 'application/json';
+    public $code = null;
+
+    function htmlContent(string $content, int $code = 200): ApiResponse
+    {
+        $this->contentType = 'text/html';
+        $this->data = $content;
+        $this->code = $code;
+        return $this;
+    }
+
+    function  exit()
+    {
+        if (is_null($this->data) && is_null($this->code)) {
+            http_response_code(404);
+        }
+        if (!is_null($this->code)) {
+            http_response_code($this->code);
+        }
+        if ($this->contentType == 'text/html') {
+            print $this->data;
+            exit();
+        }
+        jsonExit($this->data);
+    }
+}
+
+abstract class ApiController
+{
+    /** @var ApiRequest */
+    protected $req;
+
+    /** @var ApiResponse */
+    protected $response;
+
+    function __construct(ApiRequest $req, ApiResponse $response) {
+        $this->req = $req;
+        $this->response = $response;
+    }
+}
diff --git a/src/includes/notifications.php b/src/includes/notifications.php
index 86f5ca8..7c86eb6 100644
--- a/src/includes/notifications.php
+++ b/src/includes/notifications.php
@@ -1,5 +1,11 @@
 <?php declare(strict_types=1);
 
+/*
+    This file is a part of myTinyTodo.
+    (C) Copyright 2022 Max Pozdeev <maxpozdeev@gmail.com>
+    Licensed under the GNU GPL version 2 or any later. See file COPYRIGHT for details.
+*/
+
 class MTTNotificationCenter
 {
     /**
diff --git a/src/init.php b/src/init.php
index e3e7ba5..09a8339 100644
--- a/src/init.php
+++ b/src/init.php
@@ -25,6 +25,7 @@ else {
 }
 
 require_once(MTTINC. 'common.php');
+require_once(MTTINC. 'common_classes.php');
 require_once(MTTINC. 'version.php');
 require_once(MTTINC. 'class.dbconnection.php');
 require_once(MTTINC. 'class.dbcore.php');