diff --git a/map/gps/kadai.js b/map/gps/kadai.js
index 4f392f5..2b2febd 100644
--- a/map/gps/kadai.js
+++ b/map/gps/kadai.js
@@ -1,7 +1,7 @@
 document.addEventListener("DOMContentLoaded", () => {
 var koeki = L.map("gpsmap").setView([38.891, 139.824], 16);
 L.tileLayer(
-    'https//{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
+    'https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
     {attribution:
      '&copy; <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
     }).addTo(koeki);