diff --git a/src/main/resources/templates/index.html b/src/main/resources/templates/index.html
index 7969a63..45519f3 100644
--- a/src/main/resources/templates/index.html
+++ b/src/main/resources/templates/index.html
@@ -16,7 +16,7 @@
         </header>
 
         <section id="tool-bar">
-            <select id="sort-btn" title="Sort entries">Sort by
+            <select id="sort-btn" class="btn flat" title="Sort entries">Sort by
                 <option>Author A-Z</option>
                 <option>Author Z-A</option>
                 <option>Title A-Z</option>