diff --git a/apps/openseachart/custom.html b/apps/openseachart/custom.html
index 411c3520a..64e1e76d8 100644
--- a/apps/openseachart/custom.html
+++ b/apps/openseachart/custom.html
@@ -59,7 +59,7 @@ TODO:
 * What is faster? Storing as a compressed image and decompressing, or storing decompressed?
 
     */
-      var TILESIZE = 64;
+      var TILESIZE = 128;
       var OSMTILESIZE = 256;
       var OSMSUBTILES = OSMTILESIZE / TILESIZE;
       /* Can see possible tiles on http://leaflet-extras.github.io/leaflet-providers/preview/