diff --git a/point_downloader.html b/point_downloader.html
index f40e755..2d6a0c6 100644
--- a/point_downloader.html
+++ b/point_downloader.html
@@ -1,7 +1,7 @@
 <html>
 <head>
 <title>Soil Moisture Point Downloader</title>
-<script src="https://maps.googleapis.com/maps/api/js?v=3.exp&key=AIzaSyCwnQBVNThKGoy4--h4oOFih_xjChd3d3Q"></script>
+<script async defer src="https://maps.googleapis.com/maps/api/js?v=3.exp&key=AIzaSyCwnQBVNThKGoy4--h4oOFih_xjChd3d3Q&callback=initMap"></script>
 <script src="ok_polygon_coords.mini.js"></script>
 <script src="point_downloader.js"></script>
 <style>
