diff --git a/client/application.js b/client/application.js
index 6de51f1..b698809 100644
--- a/client/application.js
+++ b/client/application.js
@@ -154,6 +154,7 @@
                 $('#forgetDialog').on('show.bs.modal', function() {
                     $.getJSON('/node/getKeywords', function(keywords) {
                         $('#forgetKeyword').prop('disabled', keywords.length === 0);
+                        $('#keywordToForget').empty();
                         for (var i = 0, count = keywords.length; i < count; ++i) {
                             $('#keywordToForget').append($('<option></option>', {
                                 value: keywords[i],