diff --git a/public/index.html b/public/index.html
index dcfc549..2fcd3b1 100644
--- a/public/index.html
+++ b/public/index.html
@@ -12,12 +12,18 @@
 <nav class="navbar navbar-default navbar-static-top" role="navigation">
     <div class="container-fluid">
         <!-- Brand and toggle get grouped for better mobile display -->
+        <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-ex1-collapse">
+            <span class="sr-only">Toggle navigation</span>
+            <span class="icon-bar"></span>
+            <span class="icon-bar"></span>
+            <span class="icon-bar"></span>
+        </button>
         <div class="navbar-header">
             <a class="navbar-brand" href="#">DuplicateFinder</a>
         </div>
 
         <!-- Collect the nav links, forms, and other content for toggling -->
-        <div>
+        <div class="collapse navbar-collapse navbar-ex1-collapse">
             <ul class="nav navbar-nav">
                 <li class="active"><a href="#">Finder</a></li>
             </ul>