diff --git a/cps/templates/detail.html b/cps/templates/detail.html
index 6cb241f5..9d40dd40 100644
--- a/cps/templates/detail.html
+++ b/cps/templates/detail.html
@@ -79,7 +79,7 @@
         {% if g.user.shelf.all() or g.public_shelfes %}
         <li>
           <div class="btn-group">
-            <button type="button" class="btn btn-sm btn-default dropdown-toggle" data-toggle="dropdown">
+            <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
               <span class="glyphicon glyphicon-list"></span> Add to shelf <span class="caret"></span>
             </button>
             <ul class="dropdown-menu" role="menu">
@@ -102,7 +102,7 @@
         {% if books_shelfs %}
         <li>
           <div class="btn-group">
-            <button type="button" class="btn btn-sm btn-default dropdown-toggle" data-toggle="dropdown">
+            <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown">
               <span class="glyphicon glyphicon-list"></span> Remove from shelf <span class="caret"></span>
             </button>
             <ul class="dropdown-menu" role="menu">