diff --git a/sample.js b/sample.js
index f466b4a..5078e49 100644
--- a/sample.js
+++ b/sample.js
@@ -1,13 +1,16 @@
-var mymap = L.map("mymap").setView([38.891, 139.824], 16);
-L.tileLayer('//{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
- attribution:
-   '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
-}).addTo(mymap);
+let map = L.map('mymap').fitWorld();
+L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
+    attribution: '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors',
+    maxZoom: 18,
+    tileSize: 512,
+    zoomOffset: -1
+}).addTo(map);
+map.setView([38.70010302736321, 139.88572398517292],16);
 
-var marker = L.marker([38.891, 139.824]).addTo(mymap);
+var marker = L.marker([38.70010302736321, 139.88572398517292]).addTo(mymap);
 marker.bindPopup("<p>popup1</p><p>地図表示時に一緒に表示されます。</p>").openPopup();
 
-var marker2 = L.marker([38.891, 139.824]).addTo(mymap);
+var marker2 = L.marker([38.70010302736321, 139.88572398517292]).addTo(mymap);
 var popup = L.popup();
 function onMarker2Click(e) {
     popup