diff --git a/examples/localized-openstreetmap.js b/examples/localized-openstreetmap.js
index f0403cd760..f5b5dfeece 100644
--- a/examples/localized-openstreetmap.js
+++ b/examples/localized-openstreetmap.js
@@ -22,7 +22,7 @@ var openSeaMapLayer = new ol.layer.Tile({
       ol.source.OSM.ATTRIBUTION
     ],
     opaque: false,
-    url: 'http://tiles.openseamap.org/seamark/{z}/{x}/{y}.png'
+    url: 'https://tiles.openseamap.org/seamark/{z}/{x}/{y}.png'
   })
 });