diff --git a/index.html b/index.html
index f2bf996..0fd7cc1 100644
--- a/index.html
+++ b/index.html
@@ -40,6 +40,7 @@
         </div>
         <button id="add-calendar" type="button">Add Calendar</button>
         <button type="submit">Merge Calendars</button>
+        <button id="refresh-calendars" type="button">Refresh Calendars</button>
     </form>
     <div id="result"></div>