diff --git a/extensions/bootstrap/ButtonDropdown.php b/extensions/bootstrap/ButtonDropdown.php
index 5fc6f628c8..3563d71c3a 100644
--- a/extensions/bootstrap/ButtonDropdown.php
+++ b/extensions/bootstrap/ButtonDropdown.php
@@ -7,6 +7,7 @@
 
 namespace yii\bootstrap;
 
+use yii\helpers\ArrayHelper;
 use yii\helpers\Html;
 
 /**
@@ -37,6 +38,15 @@ class ButtonDropdown extends Widget
      * @var string the button label
      */
     public $label = 'Button';
+    /**
+     * @var array the HTML attributes for the container tag. The following special options are recognized:
+     *
+     * - tag: string, defaults to "div", the name of the container tag.
+     *
+     * @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
+     * @since 2.0.1
+     */
+    public $containerOptions = [];
     /**
      * @var array the HTML attributes of the button.
      * @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
@@ -65,10 +75,14 @@ class ButtonDropdown extends Widget
      */
     public function run()
     {
-        echo Html::beginTag('div', ['class' => 'btn-group']);
+        Html::addCssClass($this->containerOptions, 'btn-group');
+        $options = $this->containerOptions;
+        $tag = ArrayHelper::remove($options, 'tag', 'div');
+
+        echo Html::beginTag($tag, $this->containerOptions);
         echo "\n" . $this->renderButton();
         echo "\n" . $this->renderDropdown();
-        echo "\n" . Html::endTag('div');
+        echo "\n" . Html::endTag($tag);
         $this->registerPlugin('button');
     }
 
diff --git a/extensions/bootstrap/CHANGELOG.md b/extensions/bootstrap/CHANGELOG.md
index a7f48ccdce..b821620bb5 100644
--- a/extensions/bootstrap/CHANGELOG.md
+++ b/extensions/bootstrap/CHANGELOG.md
@@ -6,6 +6,7 @@ Yii Framework 2 bootstrap extension Change Log
 
 - Bug #5570: `yii\bootstrap\Tabs` would throw an exception if `content` is not set for one of its `items` (RomeroMsk)
 - Bug #6150: `yii\bootstrap\Tabs` dropdown IDs were generated incorrectly (samdark)
+- Enh #4146: Added `yii\bootstrap\ButtonDropdown::$containerOptions` (samdark)
 - Enh #4181: Added `yii\bootstrap\Modal::$headerOptions` and `yii\bootstrap\Modal::$footerOptions` (tuxoff, samdark)
 - Enh #4450: Added `yii\bootstrap\Nav::renderDropdown()` (qiangxue)
 - Enh #5735: Added `yii\bootstrap\Tabs::renderTabContent` to support manually rendering tab contents (RomeroMsk)
diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index e113d70d29..3b481f5711 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -40,6 +40,7 @@ Yii Framework 2 Change Log
 - Bug: Gii console command help information does not contain global options (qiangxue)
 - Bug: `yii\web\UrlRule` was unable to create URLs for rules containing unicode characters (samdark)
 - Bug: `yii\web\AssetManager` should not publish disabled asset bundles (qiangxue)
+- Enh #4146: Added `yii\bootstrap\ButtonDropdown::$containerOptions` (samdark)
 - Enh #4181: Added `yii\bootstrap\Modal::$headerOptions` and `yii\bootstrap\Modal::$footerOptions` (tuxoff, samdark)
 - Enh #4263: Added migration and SQL schema files for `yii\log\DbTarget` (samdark)
 - Enh #4450: Added `yii\bootstrap\Nav::renderDropdown()` (qiangxue)
diff --git a/tests/unit/extensions/bootstrap/ButtonDropdownTest.php b/tests/unit/extensions/bootstrap/ButtonDropdownTest.php
new file mode 100644
index 0000000000..d73c98a6a8
--- /dev/null
+++ b/tests/unit/extensions/bootstrap/ButtonDropdownTest.php
@@ -0,0 +1,28 @@
+<?php
+namespace yiiunit\extensions\bootstrap;
+
+use yii\bootstrap\ButtonDropdown;
+
+class ButtonDropdownTest extends BootstrapTestCase
+{
+    public function testContainerOptions()
+    {
+        $containerClass = "dropup";
+
+        ButtonDropdown::$counter = 0;
+        $out = ButtonDropdown::widget([
+            'containerOptions' => [
+                'class' => $containerClass,
+            ],
+            'label' => 'Action',
+            'dropdown' => [
+                'items' => [
+                    ['label' => 'DropdownA', 'url' => '/'],
+                    ['label' => 'DropdownB', 'url' => '#'],
+                ],
+            ],
+        ]);
+
+        $this->assertContains("$containerClass btn-group", $out);
+    }
+}
\ No newline at end of file
diff --git a/tests/unit/extensions/bootstrap/TabsTest.php b/tests/unit/extensions/bootstrap/TabsTest.php
index 05c499756e..921b9a9215 100644
--- a/tests/unit/extensions/bootstrap/TabsTest.php
+++ b/tests/unit/extensions/bootstrap/TabsTest.php
@@ -15,6 +15,7 @@ class TabsTest extends BootstrapTestCase
      */
     public function testIds()
     {
+        Tabs::$counter = 0;
         $out = Tabs::widget([
             'items' => [
                 [