diff --git a/module/project/lang/en.php b/module/project/lang/en.php
index 50d531473b..50b5bef781 100644
--- a/module/project/lang/en.php
+++ b/module/project/lang/en.php
@@ -183,7 +183,7 @@ $lang->project->groupSummary    = "<strong>%s</strong> tasks in this group, wait
 $lang->project->wbs             = "WBS";
 $lang->project->batchWBS        = "Batch WBS";
 $lang->project->largeBurnChart  = 'View large';
-$lang->project->howToUpdateBurn = "<a href='http://api.zentao.net/goto.php?item=burndown&lang=zh-cn' title='How to update burndown?' target='_blank'><i class='icon-question-sign'></i></a>";
+$lang->project->howToUpdateBurn = "<a href='http://api.zentao.net/goto.php?item=burndown&lang=zh-cn' title='How to update burndown?' target='_blank' class='btn btn-sm'><i class='icon-question-sign'></i></a>";
 $lang->project->whyNoStories    = "There no active stories to added to this {$lang->projectCommon}. Please check the linked {$lang->productCommon}.";
 $lang->project->doneProjects    = 'Done';
 $lang->project->unDoneProjects  = 'Undone';
diff --git a/module/project/lang/zh-cn.php b/module/project/lang/zh-cn.php
index 503134a2be..2c2bb08c15 100644
--- a/module/project/lang/zh-cn.php
+++ b/module/project/lang/zh-cn.php
@@ -183,7 +183,7 @@ $lang->project->groupSummary    = "本组共 <strong>%s</strong> 个任务，未
 $lang->project->wbs             = "分解任务";
 $lang->project->batchWBS        = "批量分解";
 $lang->project->largeBurnChart  = '点击查看大图';
-$lang->project->howToUpdateBurn = "<a href='http://api.zentao.net/goto.php?item=burndown&lang=zh-cn' target='_blank' title='如何更新燃尽图？'><i class='icon-question-sign'></i></a>";
+$lang->project->howToUpdateBurn = "<a href='http://api.zentao.net/goto.php?item=burndown&lang=zh-cn' target='_blank' title='如何更新燃尽图？' class='btn btn-sm'><i class='icon-question-sign'></i></a>";
 $lang->project->whyNoStories    = "看起来没有需求可以关联。请检查下{$lang->projectCommon}关联的{$lang->productCommon}中有没有需求，而且要确保它们已经审核通过。";
 $lang->project->doneProjects    = '已结束';
 $lang->project->unDoneProjects  = '未结束';
diff --git a/module/project/view/burn.html.php b/module/project/view/burn.html.php
index d2bde131a1..ab5f06a524 100644
--- a/module/project/view/burn.html.php
+++ b/module/project/view/burn.html.php
@@ -23,18 +23,12 @@
         <?php echo html::select('interval', $dayList, $interval, "class='form-control'");?>
       </div>
       <?php endif;?>
-      <div class='input-group input-group-sm pull-left w-100px'>
-        <?php
-        $weekend = ($type == 'noweekend') ? 'withweekend' : "noweekend";
-        echo "<span class='input-group-btn'>";
-        echo html::a($this->createLink('project', 'burn', "projectID=$projectID&type=$weekend&interval=$interval"), $lang->project->$weekend, '', "class='btn'");
-        echo '</span>';
-        echo "<span class='input-group-btn'>";
-        common::printLink('project', 'computeBurn', 'reload=yes', $lang->project->computeBurn, 'hiddenwin', "title='{$lang->project->computeBurn}{$lang->project->burn}' class='btn btn-primary' id='computeBurn'");
-        echo '</span>';
-        ?>
-      </div>
-      <div class='text pull-left'><?php echo $lang->project->howToUpdateBurn;?></div>
+      <?php
+      $weekend = ($type == 'noweekend') ? 'withweekend' : "noweekend";
+      echo html::a($this->createLink('project', 'burn', "projectID=$projectID&type=$weekend&interval=$interval"), $lang->project->$weekend, '', "class='btn btn-sm'");
+      common::printLink('project', 'computeBurn', 'reload=yes', $lang->project->computeBurn, 'hiddenwin', "title='{$lang->project->computeBurn}{$lang->project->burn}' class='btn btn-primary btn-sm' id='computeBurn'");
+      echo $lang->project->howToUpdateBurn;
+      ?>
     </div>
   </div>
   <div class='canvas-wrapper'><div class='chart-canvas'><canvas id='burnChart' width='800' height='400' data-bezier-curve='false' data-responsive='true'></canvas></div></div>