diff --git a/src/Accordion.php b/src/Accordion.php
index e130be4..519d4d8 100644
--- a/src/Accordion.php
+++ b/src/Accordion.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/ActiveField.php b/src/ActiveField.php
index 1ff30d5..8cc8655 100644
--- a/src/ActiveField.php
+++ b/src/ActiveField.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/ActiveForm.php b/src/ActiveForm.php
index be7d3e0..870c336 100644
--- a/src/ActiveForm.php
+++ b/src/ActiveForm.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/Alert.php b/src/Alert.php
index 4f3e161..6052907 100644
--- a/src/Alert.php
+++ b/src/Alert.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/BaseHtml.php b/src/BaseHtml.php
index 4deb2d6..e307a1d 100644
--- a/src/BaseHtml.php
+++ b/src/BaseHtml.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/BootstrapAsset.php b/src/BootstrapAsset.php
index a05e331..42a615d 100644
--- a/src/BootstrapAsset.php
+++ b/src/BootstrapAsset.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
@@ -9,10 +14,8 @@ use yii\web\AssetBundle;
 class BootstrapAsset extends AssetBundle
 {
     public $sourcePath = '@bower/bootstrap/dist';
-
     public $css = [
         'css/bootstrap.css',
     ];
-
     public $js = [];
 }
diff --git a/src/BootstrapPluginAsset.php b/src/BootstrapPluginAsset.php
index 8d88845..f194edb 100644
--- a/src/BootstrapPluginAsset.php
+++ b/src/BootstrapPluginAsset.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/BootstrapWidgetTrait.php b/src/BootstrapWidgetTrait.php
index 7235656..4706dd0 100644
--- a/src/BootstrapWidgetTrait.php
+++ b/src/BootstrapWidgetTrait.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/Breadcrumbs.php b/src/Breadcrumbs.php
index 5d46e94..f6de031 100644
--- a/src/Breadcrumbs.php
+++ b/src/Breadcrumbs.php
@@ -5,6 +5,8 @@
  * @license http://www.yiiframework.com/license/
  */
 
+declare(strict_types=1);
+
 namespace yii\bootstrap5;
 
 use RuntimeException;
diff --git a/src/Button.php b/src/Button.php
index d650ae2..9f94cb9 100644
--- a/src/Button.php
+++ b/src/Button.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/ButtonDropdown.php b/src/ButtonDropdown.php
index 7293540..9b9448c 100644
--- a/src/ButtonDropdown.php
+++ b/src/ButtonDropdown.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/ButtonGroup.php b/src/ButtonGroup.php
index 5283c65..d7e5318 100644
--- a/src/ButtonGroup.php
+++ b/src/ButtonGroup.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/ButtonToolbar.php b/src/ButtonToolbar.php
index ace521b..1c8479a 100644
--- a/src/ButtonToolbar.php
+++ b/src/ButtonToolbar.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/Carousel.php b/src/Carousel.php
index 7d5ac33..48ed861 100644
--- a/src/Carousel.php
+++ b/src/Carousel.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
@@ -45,7 +50,6 @@ class Carousel extends Widget
         '<span class="carousel-control-prev-icon" aria-hidden="true"></span><span class="visually-hidden">Previous</span>',
         '<span class="carousel-control-next-icon" aria-hidden="true"></span><span class="visually-hidden">Next</span>',
     ];
-
     /**
      * @var bool whether carousel indicators (<ol> tag with anchors to items) should be displayed or not.
      */
diff --git a/src/Dropdown.php b/src/Dropdown.php
index 2d6806d..918c3eb 100644
--- a/src/Dropdown.php
+++ b/src/Dropdown.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/Html.php b/src/Html.php
index 5d46d44..0116305 100644
--- a/src/Html.php
+++ b/src/Html.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/InputWidget.php b/src/InputWidget.php
index 864beb9..f6a291a 100644
--- a/src/InputWidget.php
+++ b/src/InputWidget.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/LinkPager.php b/src/LinkPager.php
index 15d7da9..6195622 100644
--- a/src/LinkPager.php
+++ b/src/LinkPager.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/Modal.php b/src/Modal.php
index 717c62a..9276d27 100644
--- a/src/Modal.php
+++ b/src/Modal.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/Nav.php b/src/Nav.php
index be88203..4501e57 100644
--- a/src/Nav.php
+++ b/src/Nav.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/NavBar.php b/src/NavBar.php
index 7768fb1..950056a 100644
--- a/src/NavBar.php
+++ b/src/NavBar.php
@@ -5,6 +5,8 @@
  * @license http://www.yiiframework.com/license/
  */
 
+declare(strict_types=1);
+
 namespace yii\bootstrap5;
 
 use Yii;
diff --git a/src/Offcanvas.php b/src/Offcanvas.php
index 680cad0..2e24f67 100644
--- a/src/Offcanvas.php
+++ b/src/Offcanvas.php
@@ -1,9 +1,12 @@
 <?php
 /**
- * @package yii2-bootstrap5
- * @author Simon Karlen <simi.albi@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
  */
 
+declare(strict_types=1);
+
 namespace yii\bootstrap5;
 
 use yii\helpers\ArrayHelper;
@@ -42,22 +45,18 @@ class Offcanvas extends Widget
      * @var string Where to place the offcanvas. Can be of of the [[PLACEMENT_*]] constants.
      */
     public $placement = self::PLACEMENT_START;
-
     /**
      * @var boolean Whether to enable backdrop or not. Defaults to `true`.
      */
     public $backdrop = true;
-
     /**
      * @var boolean Whether to enable body scrolling or not. Defaults to `false`.
      */
     public $scrolling = false;
-
     /**
      * @var string The title content in the offcanvas container.
      */
     public $title;
-
     /**
      * @var array|false the options for rendering the close button tag.
      * The close button is displayed in the header of the offcanvas container. Clicking
@@ -72,7 +71,6 @@ class Offcanvas extends Widget
      * for the supported HTML attributes.
      */
     public $closeButton = [];
-
     /**
      * @var array|false the options for rendering the toggle button tag.
      * The toggle button is used to toggle the visibility of the modal window.
@@ -88,13 +86,11 @@ class Offcanvas extends Widget
      * for the supported HTML attributes.
      */
     public $toggleButton = false;
-
     /**
      * @var array Additional header options.
      * @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
      */
     public $headerOptions = [];
-
     /**
      * @var array Additional title options.
      *
@@ -105,13 +101,13 @@ class Offcanvas extends Widget
      * @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
      */
     public $titleOptions = [];
-
     /**
      * @var array Additional body options.
      * @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
      */
     public $bodyOptions = [];
 
+
     /**
      * {@inheritDoc}
      */
diff --git a/src/Popover.php b/src/Popover.php
index fa2ba34..53627f6 100644
--- a/src/Popover.php
+++ b/src/Popover.php
@@ -1,9 +1,12 @@
 <?php
 /**
- * @package yii2-bootstrap5
- * @author Simon Karlen <simi.albi@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
  */
 
+declare(strict_types=1);
+
 namespace yii\bootstrap5;
 
 use yii\helpers\ArrayHelper;
@@ -35,7 +38,6 @@ class Popover extends Widget
     const PLACEMENT_BOTTOM = 'bottom';
     const PLACEMENT_LEFT = 'left';
     const PLACEMENT_RIGHT = 'right';
-
     const TRIGGER_CLICK = 'click';
     const TRIGGER_HOVER = 'hover';
     const TRIGGER_FOCUS = 'focus';
@@ -81,6 +83,7 @@ class Popover extends Widget
      */
     public $toggleButton = false;
 
+
     /**
      * {@inheritDoc}
      */
diff --git a/src/Progress.php b/src/Progress.php
index 3056fab..2edd3f9 100644
--- a/src/Progress.php
+++ b/src/Progress.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/Tabs.php b/src/Tabs.php
index 4bf9492..5659404 100644
--- a/src/Tabs.php
+++ b/src/Tabs.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/Toast.php b/src/Toast.php
index 76bd1a8..9b74d23 100644
--- a/src/Toast.php
+++ b/src/Toast.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/ToggleButtonGroup.php b/src/ToggleButtonGroup.php
index c9c5b63..327d046 100644
--- a/src/ToggleButtonGroup.php
+++ b/src/ToggleButtonGroup.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/src/Widget.php b/src/Widget.php
index 2853cbc..0b096a3 100644
--- a/src/Widget.php
+++ b/src/Widget.php
@@ -1,4 +1,9 @@
 <?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
 
 declare(strict_types=1);
 
diff --git a/tests/TabsTest.php b/tests/TabsTest.php
index 4df7e7a..fc6dd9b 100644
--- a/tests/TabsTest.php
+++ b/tests/TabsTest.php
@@ -368,7 +368,7 @@ class TabsTest extends TestCase
 <div id="w0-tab1" class="tab-pane"><div>Content 2</div></div></div>
 HTML;
 
-        $this->assertEquals($expected, $html);
+        $this->assertEqualsWithoutLE($expected, $html);
     }
 
     public function testHeaderOptions()