diff --git a/var/Typecho/Widget/Helper/Form/Element/Submit.php b/var/Typecho/Widget/Helper/Form/Element/Submit.php
index 1d88f513..bf85ee25 100644
--- a/var/Typecho/Widget/Helper/Form/Element/Submit.php
+++ b/var/Typecho/Widget/Helper/Form/Element/Submit.php
@@ -32,7 +32,7 @@ class Typecho_Widget_Helper_Form_Element_Submit extends Typecho_Widget_Helper_Fo
      */
     public function input($name = NULL, array $options = NULL)
     {
-        $this->setAttribute('class', 'typecho-option typecho-option-submit');
+        $this->setAttribute('class', 'btn typecho-option typecho-option-submit');
         $input = new Typecho_Widget_Helper_Layout('button', array('type' => 'submit'));
         $this->container($input);
         $this->inputs[] = $input;
diff --git a/var/Widget/Contents/Attachment/Edit.php b/var/Widget/Contents/Attachment/Edit.php
index e428aacd..7839d9cd 100644
--- a/var/Widget/Contents/Attachment/Edit.php
+++ b/var/Widget/Contents/Attachment/Edit.php
@@ -140,7 +140,7 @@ class Widget_Contents_Attachment_Edit extends Widget_Contents_Post_Edit implemen
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit(NULL, NULL, _t('提交修改'));
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $delete = new Typecho_Widget_Helper_Layout('a', array('href' =>
         Typecho_Common::url('/action/contents-attachment-edit?do=delete&cid=' . $this->cid, $this->options->index),
         'class' => 'operate-delete',
diff --git a/var/Widget/Metas/Category/Edit.php b/var/Widget/Metas/Category/Edit.php
index e33cfa00..aa4ca498 100644
--- a/var/Widget/Metas/Category/Edit.php
+++ b/var/Widget/Metas/Category/Edit.php
@@ -150,7 +150,7 @@ class Widget_Metas_Category_Edit extends Widget_Abstract_Metas implements Widget
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit();
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
 
         if (isset($this->request->mid) && 'insert' != $action) {
diff --git a/var/Widget/Metas/Tag/Edit.php b/var/Widget/Metas/Tag/Edit.php
index 23d932f5..f3df23d8 100644
--- a/var/Widget/Metas/Tag/Edit.php
+++ b/var/Widget/Metas/Tag/Edit.php
@@ -147,7 +147,7 @@ class Widget_Metas_Tag_Edit extends Widget_Abstract_Metas implements Widget_Inte
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit();
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
 
         if (isset($this->request->mid) && 'insert' != $action) {
diff --git a/var/Widget/Options/Discussion.php b/var/Widget/Options/Discussion.php
index c41d2b5a..9ebbc3ca 100644
--- a/var/Widget/Options/Discussion.php
+++ b/var/Widget/Options/Discussion.php
@@ -163,7 +163,7 @@ class Widget_Options_Discussion extends Widget_Abstract_Options implements Widge
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit('submit', NULL, _t('保存设置'));
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
 
         return $form;
diff --git a/var/Widget/Options/General.php b/var/Widget/Options/General.php
index 6722399f..8955e338 100644
--- a/var/Widget/Options/General.php
+++ b/var/Widget/Options/General.php
@@ -128,7 +128,7 @@ class Widget_Options_General extends Widget_Abstract_Options implements Widget_I
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit('submit', NULL, _t('保存设置'));
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
 
         return $form;
diff --git a/var/Widget/Options/Permalink.php b/var/Widget/Options/Permalink.php
index 820a3f9f..a76cca28 100644
--- a/var/Widget/Options/Permalink.php
+++ b/var/Widget/Options/Permalink.php
@@ -263,7 +263,7 @@ RewriteRule . {$basePath}index.php [L]
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit('submit', NULL, _t('保存设置'));
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
 
         return $form;
diff --git a/var/Widget/Options/Reading.php b/var/Widget/Options/Reading.php
index 0472136f..f2892c0b 100644
--- a/var/Widget/Options/Reading.php
+++ b/var/Widget/Options/Reading.php
@@ -138,7 +138,7 @@ class Widget_Options_Reading extends Widget_Options_Permalink
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit('submit', NULL, _t('保存设置'));
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
 
         return $form;
diff --git a/var/Widget/Plugins/Config.php b/var/Widget/Plugins/Config.php
index 23eb75b1..921f44ac 100644
--- a/var/Widget/Plugins/Config.php
+++ b/var/Widget/Plugins/Config.php
@@ -107,7 +107,7 @@ class Widget_Plugins_Config extends Widget_Abstract_Options
         }
 
         $submit = new Typecho_Widget_Helper_Form_Element_Submit(NULL, NULL, _t('保存设置'));
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
         return $form;
     }
diff --git a/var/Widget/Themes/Config.php b/var/Widget/Themes/Config.php
index a2ae9c75..60c27cdd 100644
--- a/var/Widget/Themes/Config.php
+++ b/var/Widget/Themes/Config.php
@@ -85,7 +85,7 @@ class Widget_Themes_Config extends Widget_Abstract_Options
         }
 
         $submit = new Typecho_Widget_Helper_Form_Element_Submit(NULL, NULL, _t('保存设置'));
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
         return $form;
     }
diff --git a/var/Widget/Users/Edit.php b/var/Widget/Users/Edit.php
index a406fce7..6dc825e4 100644
--- a/var/Widget/Users/Edit.php
+++ b/var/Widget/Users/Edit.php
@@ -140,7 +140,7 @@ class Widget_Users_Edit extends Widget_Abstract_Users implements Widget_Interfac
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit();
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
 
         if (NULL != $this->request->uid) {
diff --git a/var/Widget/Users/Profile.php b/var/Widget/Users/Profile.php
index cef6c36c..80994590 100644
--- a/var/Widget/Users/Profile.php
+++ b/var/Widget/Users/Profile.php
@@ -64,7 +64,7 @@ class Widget_Users_Profile extends Widget_Users_Edit implements Widget_Interface
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit('submit', NULL, _t('更新我的档案'));
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
 
         $screenName->value($this->user->screenName);
@@ -132,7 +132,7 @@ class Widget_Users_Profile extends Widget_Users_Edit implements Widget_Interface
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit('submit', NULL, _t('保存设置'));
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
 
         return $form;
@@ -226,7 +226,7 @@ class Widget_Users_Profile extends Widget_Users_Edit implements Widget_Interface
 
         /** 提交按钮 */
         $submit = new Typecho_Widget_Helper_Form_Element_Submit('submit', NULL, _t('更新密码'));
-        $submit->input->setAttribute('class', 'primary');
+        $submit->input->setAttribute('class', 'btn primary');
         $form->addItem($submit);
 
         $password->addRule('required', _t('必须填写密码'));