diff --git a/js/app.js b/js/app.js
index 6d9719df..4d815f07 100644
--- a/js/app.js
+++ b/js/app.js
@@ -80,14 +80,14 @@ app = Sammy('#main', function (sam) {
                 }
             } else {
                 if (level == 'log') {
-                    $('#flash').append('<pre style="display:none" class="alert '+ alertClass +'"><div><button type="button" class="btn btn-default btn-small">'+ y18n.t('log') +'</button></div><p style="display: none">'+ message +'</p></pre>').show();
+                    $('#flash').append('<pre style="display:none" class="alert alert-dismissable '+ alertClass +'"><button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button><div><button type="button" class="btn btn-default btn-small">'+ y18n.t('log') +'</button></div><p style="display: none">'+ message +'</p></pre>').show();
                 } else {
-                    $('#flash').append('<div style="display:none" class="alert '+ alertClass +'"><p>'+ message +'</p></div>').show();
+                    $('#flash').append('<div style="display:none" class="alert alert-dismissable '+ alertClass +'"><button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times;</button><p>'+ message +'</p></div>').show();
                 }
                 $('#flash .alert').last().fadeIn();
             }
             document.body.scrollTop = document.documentElement.scrollTop = 0;
-            $('#flash .alert-log button').on('click', function() {
+            $('#flash .alert-log button.btn-small').on('click', function() {
                 $('#flash .alert-log p:hidden').fadeIn();
                 $('#flash .alert-log div').hide();
             });