diff --git a/app/static/app/js/components/Map.jsx b/app/static/app/js/components/Map.jsx
index 7cf2a2480..810b66661 100644
--- a/app/static/app/js/components/Map.jsx
+++ b/app/static/app/js/components/Map.jsx
@@ -399,14 +399,14 @@ class Map extends React.Component {
 
       const customLayer = L.layerGroup();
       customLayer.on("add", a => {
-        const defaultCustomBm = window.localStorage.getItem('lastCustomBasemap') || 'https://a.tile.openstreetmap.org/{z}/{x}/{y}.png';
+        const defaultCustomBm = window.localStorage.getItem('lastCustomBasemap') || 'https://tile.openstreetmap.org/{z}/{x}/{y}.png';
       
         let url = window.prompt([_('Enter a tile URL template. Valid coordinates are:'),
 _('{z}, {x}, {y} for Z/X/Y tile scheme'),
 _('{-y} for flipped TMS-style Y coordinates'),
 '',
 _('Example:'),
-'https://a.tile.openstreetmap.org/{z}/{x}/{y}.png'].join("\n"), defaultCustomBm);
+'https://tile.openstreetmap.org/{z}/{x}/{y}.png'].join("\n"), defaultCustomBm);
         
         if (url){
           customLayer.clearLayers();