diff --git a/framework/base/Application.php b/framework/base/Application.php
index bbc4601..3dcbb26 100644
--- a/framework/base/Application.php
+++ b/framework/base/Application.php
@@ -8,7 +8,7 @@
 namespace yii\base;
 
 use Yii;
-use yii\util\FileHelper;
+use yii\helpers\FileHelper;
 
 /**
  * Application is the base class for all application classes.
diff --git a/framework/base/Controller.php b/framework/base/Controller.php
index 9219904..17fb4da 100644
--- a/framework/base/Controller.php
+++ b/framework/base/Controller.php
@@ -8,8 +8,8 @@
 namespace yii\base;
 
 use Yii;
-use yii\util\FileHelper;
-use yii\util\StringHelper;
+use yii\helpers\FileHelper;
+use yii\helpers\StringHelper;
 
 /**
  * Controller is the base class for classes containing controller logic.
diff --git a/framework/base/Dictionary.php b/framework/base/Dictionary.php
index 343dbfd..9343d68 100644
--- a/framework/base/Dictionary.php
+++ b/framework/base/Dictionary.php
@@ -7,7 +7,7 @@
 
 namespace yii\base;
 
-use yii\util\ArrayHelper;
+use yii\helpers\ArrayHelper;
 
 /**
  * Dictionary implements a collection that stores key-value pairs.
diff --git a/framework/base/ErrorHandler.php b/framework/base/ErrorHandler.php
index 996fa18..a3ab137 100644
--- a/framework/base/ErrorHandler.php
+++ b/framework/base/ErrorHandler.php
@@ -16,7 +16,7 @@ namespace yii\base;
  * @author Qiang Xue <qiang.xue@gmail.com>
  * @since 2.0
  */
-use yii\util\VarDumper;
+use yii\helpers\VarDumper;
 
 class ErrorHandler extends Component
 {
diff --git a/framework/base/Model.php b/framework/base/Model.php
index b761ada..402a558 100644
--- a/framework/base/Model.php
+++ b/framework/base/Model.php
@@ -7,7 +7,7 @@
 
 namespace yii\base;
 
-use yii\util\StringHelper;
+use yii\helpers\StringHelper;
 use yii\validators\Validator;
 use yii\validators\RequiredValidator;
 
diff --git a/framework/base/Module.php b/framework/base/Module.php
index 0e5c1cb..9988164 100644
--- a/framework/base/Module.php
+++ b/framework/base/Module.php
@@ -8,8 +8,8 @@
 namespace yii\base;
 
 use Yii;
-use yii\util\StringHelper;
-use yii\util\FileHelper;
+use yii\helpers\StringHelper;
+use yii\helpers\FileHelper;
 
 /**
  * Module is the base class for module and application classes.
diff --git a/framework/base/Theme.php b/framework/base/Theme.php
index c5fd925..88ecb0a 100644
--- a/framework/base/Theme.php
+++ b/framework/base/Theme.php
@@ -9,7 +9,7 @@ namespace yii\base;
 
 use Yii;
 use yii\base\InvalidConfigException;
-use yii\util\FileHelper;
+use yii\helpers\FileHelper;
 
 /**
  * Theme represents an application theme.
diff --git a/framework/base/View.php b/framework/base/View.php
index 86020ad..36c90ad 100644
--- a/framework/base/View.php
+++ b/framework/base/View.php
@@ -9,7 +9,7 @@ namespace yii\base;
 
 use Yii;
 use yii\base\Application;
-use yii\util\FileHelper;
+use yii\helpers\FileHelper;
 
 /**
  * View represents a view object in the MVC pattern.
diff --git a/framework/base/Widget.php b/framework/base/Widget.php
index 6b92f09..24d0685 100644
--- a/framework/base/Widget.php
+++ b/framework/base/Widget.php
@@ -8,7 +8,7 @@
 namespace yii\base;
 
 use Yii;
-use yii\util\FileHelper;
+use yii\helpers\FileHelper;
 
 /**
  * Widget is the base class for widgets.
diff --git a/framework/console/controllers/AppController.php b/framework/console/controllers/AppController.php
index 78cf6fc..93ef5f5 100644
--- a/framework/console/controllers/AppController.php
+++ b/framework/console/controllers/AppController.php
@@ -8,7 +8,7 @@
 namespace yii\console\controllers;
 
 use yii\console\Controller;
-use yii\util\FileHelper;
+use yii\helpers\FileHelper;
 use yii\base\Exception;
 
 /**
diff --git a/framework/console/controllers/HelpController.php b/framework/console/controllers/HelpController.php
index 01bc994..ea7e3d5 100644
--- a/framework/console/controllers/HelpController.php
+++ b/framework/console/controllers/HelpController.php
@@ -13,7 +13,7 @@ use yii\console\Exception;
 use yii\base\InlineAction;
 use yii\console\Controller;
 use yii\console\Request;
-use yii\util\StringHelper;
+use yii\helpers\StringHelper;
 
 /**
  * This command provides help information about console commands.
diff --git a/framework/console/controllers/MigrateController.php b/framework/console/controllers/MigrateController.php
index 06e100b..7f9a18f 100644
--- a/framework/console/controllers/MigrateController.php
+++ b/framework/console/controllers/MigrateController.php
@@ -13,7 +13,7 @@ use yii\console\Exception;
 use yii\console\Controller;
 use yii\db\Connection;
 use yii\db\Query;
-use yii\util\ArrayHelper;
+use yii\helpers\ArrayHelper;
 
 /**
  * This command manages application migrations.
diff --git a/framework/db/ActiveRecord.php b/framework/db/ActiveRecord.php
index f8d2b99..0c15121 100644
--- a/framework/db/ActiveRecord.php
+++ b/framework/db/ActiveRecord.php
@@ -16,7 +16,7 @@ use yii\base\InvalidCallException;
 use yii\db\Connection;
 use yii\db\TableSchema;
 use yii\db\Expression;
-use yii\util\StringHelper;
+use yii\helpers\StringHelper;
 
 /**
  * ActiveRecord is the base class for classes representing relational data in terms of objects.
diff --git a/framework/helpers/ArrayHelper.php b/framework/helpers/ArrayHelper.php
index 447d034..65fa962 100644
--- a/framework/helpers/ArrayHelper.php
+++ b/framework/helpers/ArrayHelper.php
@@ -5,7 +5,7 @@
  * @license http://www.yiiframework.com/license/
  */
 
-namespace yii\util;
+namespace yii\helpers;
 
 use Yii;
 use yii\base\InvalidParamException;
@@ -59,11 +59,11 @@ class ArrayHelper
 	 *
 	 * ~~~
 	 * // working with array
-	 * $username = \yii\util\ArrayHelper::getValue($_POST, 'username');
+	 * $username = \yii\helpers\ArrayHelper::getValue($_POST, 'username');
 	 * // working with object
-	 * $username = \yii\util\ArrayHelper::getValue($user, 'username');
+	 * $username = \yii\helpers\ArrayHelper::getValue($user, 'username');
 	 * // working with anonymous function
-	 * $fullName = \yii\util\ArrayHelper::getValue($user, function($user, $defaultValue) {
+	 * $fullName = \yii\helpers\ArrayHelper::getValue($user, function($user, $defaultValue) {
 	 *     return $user->firstName . ' ' . $user->lastName;
 	 * });
 	 * ~~~
diff --git a/framework/helpers/ConsoleColor.php b/framework/helpers/ConsoleColor.php
index 74aa154..c64db24 100644
--- a/framework/helpers/ConsoleColor.php
+++ b/framework/helpers/ConsoleColor.php
@@ -5,7 +5,7 @@
  * @license http://www.yiiframework.com/license/
  */
 
-namespace yii\util;
+namespace yii\helpers;
 
 // todo define how subclassing will work
 // todo add a run() or render() method
diff --git a/framework/helpers/FileHelper.php b/framework/helpers/FileHelper.php
index 9108476..f850b98 100644
--- a/framework/helpers/FileHelper.php
+++ b/framework/helpers/FileHelper.php
@@ -7,7 +7,7 @@
  * @license http://www.yiiframework.com/license/
  */
 
-namespace yii\util;
+namespace yii\helpers;
 
 use yii\base\Exception;
 use yii\base\InvalidConfigException;
diff --git a/framework/helpers/Html.php b/framework/helpers/Html.php
index a7b744b..b004885 100644
--- a/framework/helpers/Html.php
+++ b/framework/helpers/Html.php
@@ -5,7 +5,7 @@
  * @license http://www.yiiframework.com/license/
  */
 
-namespace yii\util;
+namespace yii\helpers;
 
 use Yii;
 use yii\base\InvalidParamException;
@@ -655,7 +655,7 @@ class Html
 	 * are the corresponding option labels. The array can also be nested (i.e. some array values are arrays too).
 	 * For each sub-array, an option group will be generated whose label is the key associated with the sub-array.
 	 * If you have a list of data models, you may convert them into the format described above using
-	 * [[\yii\util\ArrayHelper::map()]].
+	 * [[\yii\helpers\ArrayHelper::map()]].
 	 *
 	 * Note, the values and labels will be automatically HTML-encoded by this method, and the blank spaces in
 	 * the labels will also be HTML-encoded.
@@ -695,7 +695,7 @@ class Html
 	 * are the corresponding option labels. The array can also be nested (i.e. some array values are arrays too).
 	 * For each sub-array, an option group will be generated whose label is the key associated with the sub-array.
 	 * If you have a list of data models, you may convert them into the format described above using
-	 * [[\yii\util\ArrayHelper::map()]].
+	 * [[\yii\helpers\ArrayHelper::map()]].
 	 *
 	 * Note, the values and labels will be automatically HTML-encoded by this method, and the blank spaces in
 	 * the labels will also be HTML-encoded.
@@ -866,7 +866,7 @@ class Html
 	 * are the corresponding option labels. The array can also be nested (i.e. some array values are arrays too).
 	 * For each sub-array, an option group will be generated whose label is the key associated with the sub-array.
 	 * If you have a list of data models, you may convert them into the format described above using
-	 * [[\yii\util\ArrayHelper::map()]].
+	 * [[\yii\helpers\ArrayHelper::map()]].
 	 *
 	 * Note, the values and labels will be automatically HTML-encoded by this method, and the blank spaces in
 	 * the labels will also be HTML-encoded.
diff --git a/framework/helpers/SecurityHelper.php b/framework/helpers/SecurityHelper.php
index 4186681..5029dd6 100644
--- a/framework/helpers/SecurityHelper.php
+++ b/framework/helpers/SecurityHelper.php
@@ -5,7 +5,7 @@
  * @license http://www.yiiframework.com/license/
  */
 
-namespace yii\util;
+namespace yii\helpers;
 
 use Yii;
 use yii\base\Exception;
diff --git a/framework/helpers/StringHelper.php b/framework/helpers/StringHelper.php
index 3874701..ace34db 100644
--- a/framework/helpers/StringHelper.php
+++ b/framework/helpers/StringHelper.php
@@ -5,7 +5,7 @@
  * @license http://www.yiiframework.com/license/
  */
 
-namespace yii\util;
+namespace yii\helpers;
 
 /**
  * StringHelper
diff --git a/framework/helpers/VarDumper.php b/framework/helpers/VarDumper.php
index ae474e6..64c3639 100644
--- a/framework/helpers/VarDumper.php
+++ b/framework/helpers/VarDumper.php
@@ -6,7 +6,7 @@
  * @license http://www.yiiframework.com/license/
  */
 
-namespace yii\util;
+namespace yii\helpers;
 
 /**
  * VarDumper is intended to replace the buggy PHP function var_dump and print_r.
diff --git a/framework/web/CookieCollection.php b/framework/web/CookieCollection.php
index 2577d35..c76926b 100644
--- a/framework/web/CookieCollection.php
+++ b/framework/web/CookieCollection.php
@@ -9,7 +9,7 @@ namespace yii\web;
 
 use Yii;
 use yii\base\DictionaryIterator;
-use yii\util\SecurityHelper;
+use yii\helpers\SecurityHelper;
 
 /**
  * CookieCollection maintains the cookies available in the current request.
diff --git a/framework/web/Response.php b/framework/web/Response.php
index 3a0ce8b..d6659cf 100644
--- a/framework/web/Response.php
+++ b/framework/web/Response.php
@@ -7,7 +7,7 @@
 
 namespace yii\web;
 
-use yii\util\FileHelper;
+use yii\helpers\FileHelper;
 
 /**
  * @author Qiang Xue <qiang.xue@gmail.com>
diff --git a/framework/web/Sort.php b/framework/web/Sort.php
index 85e9ce8..7cfeeca 100644
--- a/framework/web/Sort.php
+++ b/framework/web/Sort.php
@@ -8,7 +8,7 @@
 namespace yii\web;
 
 use Yii;
-use yii\util\Html;
+use yii\helpers\Html;
 
 /**
  * Sort represents information relevant to sorting.
diff --git a/framework/widgets/ActiveForm.php b/framework/widgets/ActiveForm.php
index 2d47253..2c965e7 100644
--- a/framework/widgets/ActiveForm.php
+++ b/framework/widgets/ActiveForm.php
@@ -11,8 +11,8 @@ use Yii;
 use yii\base\InvalidParamException;
 use yii\base\Widget;
 use yii\base\Model;
-use yii\util\Html;
-use yii\util\ArrayHelper;
+use yii\helpers\Html;
+use yii\helpers\ArrayHelper;
 
 /**
  * ActiveForm ...
@@ -23,7 +23,7 @@ use yii\util\ArrayHelper;
 class ActiveForm extends Widget
 {
 	/**
-	 * @param array|string $action the form action URL. This parameter will be processed by [[\yii\util\Html::url()]].
+	 * @param array|string $action the form action URL. This parameter will be processed by [[\yii\helpers\Html::url()]].
 	 */
 	public $action = '';
 	/**
diff --git a/tests/unit/framework/util/ArrayHelperTest.php b/tests/unit/framework/util/ArrayHelperTest.php
index a36ce68..117c702 100644
--- a/tests/unit/framework/util/ArrayHelperTest.php
+++ b/tests/unit/framework/util/ArrayHelperTest.php
@@ -2,7 +2,7 @@
 
 namespace yiiunit\framework\util;
 
-use yii\util\ArrayHelper;
+use yii\helpers\ArrayHelper;
 
 class ArrayHelperTest extends \yii\test\TestCase
 {
diff --git a/tests/unit/framework/util/HtmlTest.php b/tests/unit/framework/util/HtmlTest.php
index a887f29..eba1a20 100644
--- a/tests/unit/framework/util/HtmlTest.php
+++ b/tests/unit/framework/util/HtmlTest.php
@@ -3,7 +3,7 @@
 namespace yiiunit\framework\util;
 
 use Yii;
-use yii\util\Html;
+use yii\helpers\Html;
 use yii\web\Application;
 
 class HtmlTest extends \yii\test\TestCase
diff --git a/tests/web/app/protected/controllers/SiteController.php b/tests/web/app/protected/controllers/SiteController.php
index 38efce3..050bf90 100644
--- a/tests/web/app/protected/controllers/SiteController.php
+++ b/tests/web/app/protected/controllers/SiteController.php
@@ -1,6 +1,6 @@
 <?php
 
-use yii\util\Html;
+use yii\helpers\Html;
 
 class DefaultController extends \yii\web\Controller
 {