diff --git a/src/index.html b/src/index.html
index f82df16b4..e67fabd40 100755
--- a/src/index.html
+++ b/src/index.html
@@ -90,6 +90,9 @@
             padding: 0px;
             border: none;
             list-style: none;
+            -webkit-user-select: none;
+            -moz-user-select: none;
+            -ms-user-select: none;
             user-select: none;
             box-sizing: border-box;
             text-decoration: none;