diff --git a/src/main/twirl/gitbucket/core/issues/commentlist.scala.html b/src/main/twirl/gitbucket/core/issues/commentlist.scala.html
index 8c63692..9ba0935 100644
--- a/src/main/twirl/gitbucket/core/issues/commentlist.scala.html
+++ b/src/main/twirl/gitbucket/core/issues/commentlist.scala.html
@@ -210,7 +210,7 @@
   $(document).on('click', '.commit-comment-box i.octicon-pencil', function(){
     var id  = $(this).closest('a').data('comment-id');
     var url = '@url(repository)/commit_comments/_data/' + id;
-    var $content = $('.commit-commentContent-' + id, $(this).closest('.box'));
+    var $content = $('.commit-commentContent-' + id, $(this).closest('.commit-comment-box'));
 
     $.get(url,
     {
diff --git a/src/main/twirl/gitbucket/core/pulls/mergeguide.scala.html b/src/main/twirl/gitbucket/core/pulls/mergeguide.scala.html
index c39dd4d..50cca17 100644
--- a/src/main/twirl/gitbucket/core/pulls/mergeguide.scala.html
+++ b/src/main/twirl/gitbucket/core/pulls/mergeguide.scala.html
@@ -139,7 +139,7 @@
           Merge pull request #@issue.issueId from @{pullreq.requestUserName}/@{pullreq.requestBranch}
         </div>
         <span id="error-message" class="error"></span>
-        <textarea name="message" style="width: 635px; height: 80px;">@issue.title</textarea>
+        <textarea name="message" style="height: 80px;" class="form-control">@issue.title</textarea>
         <div>
           <input type="button" class="btn" value="Cancel" id="cancel-merge-pull-request"/>
           <input type="submit" class="btn btn-success" value="Confirm merge"/>
diff --git a/src/main/twirl/gitbucket/core/repo/editcomment.scala.html b/src/main/twirl/gitbucket/core/repo/editcomment.scala.html
index 5e1c4cf..62fd5c2 100644
--- a/src/main/twirl/gitbucket/core/repo/editcomment.scala.html
+++ b/src/main/twirl/gitbucket/core/repo/editcomment.scala.html
@@ -2,11 +2,11 @@
 @import context._
 <span class="error-edit-content-@commentId error"></span>
 @helper.html.attached(owner, repository){
-  <textarea style="width: 635px; height: 100px;" id="edit-content-@commentId">@content</textarea>
+  <textarea style="height: 100px;" id="edit-content-@commentId" class="form-control">@content</textarea>
 }
 <div>
   <input type="button" class="cancel-comment-@commentId btn btn-small btn-danger" value="Cancel"/>
-  <input type="button" class="update-comment-@commentId btn btn-small pull-right" value="Update comment"/>
+  <input type="button" class="update-comment-@commentId btn btn-small btn-default pull-right" value="Update comment"/>
 </div>
 <script>
 $(function(){
@@ -19,7 +19,7 @@
   }
 
   $(document).on('click', '.update-comment-@commentId', function(){
-    $box = $(this).closest('.box');
+    $box = $(this).closest('.commit-comment-box');
     $('.update-comment-@commentId, .cancel-comment-@commentId', $box).attr('disabled', 'disabled');
     $.ajax({
       url: '@path/@owner/@repository/commit_comments/edit/@commentId',