diff --git a/src/main/java/kst4contest/view/map/MapHtmlResources.java b/src/main/java/kst4contest/view/map/MapHtmlResources.java
index f4c6671..f559276 100644
--- a/src/main/java/kst4contest/view/map/MapHtmlResources.java
+++ b/src/main/java/kst4contest/view/map/MapHtmlResources.java
@@ -370,10 +370,21 @@ public final class MapHtmlResources {
 
                             jsLog('Leaflet map initialized');
 
-                            L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
-                                maxZoom: 18,
-                                attribution: '© OpenStreetMap'
-                            }).addTo(map);
+                            const osmTileLayer = L.tileLayer('https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
+                                maxZoom: 19,
+                                attribution: '© OpenStreetMap contributors'
+                            });
+
+                            osmTileLayer.on('tileload', function (event) {
+                                jsLog('OSM tile loaded');
+                            });
+
+                            osmTileLayer.on('tileerror', function (event) {
+                                const src = event && event.tile ? event.tile.src : 'unknown';
+                                jsError('OSM tile load failed: ' + src);
+                            });
+
+                            osmTileLayer.addTo(map);
 
                             map.createPane('beamPane');
                             map.getPane('beamPane').style.zIndex = 410;
diff --git a/src/main/java/kst4contest/view/map/StationMapView.java b/src/main/java/kst4contest/view/map/StationMapView.java
index d2b9aa4..d0f988a 100644
--- a/src/main/java/kst4contest/view/map/StationMapView.java
+++ b/src/main/java/kst4contest/view/map/StationMapView.java
@@ -627,6 +627,8 @@ public final class StationMapView {
             }
         });
 
+        webEngine.setUserAgent("KST4Contest (+https://hamradioonline.de)");
+
         webEngine.loadContent(MapHtmlResources.createStationMapHtml());
     }
 
diff --git a/src/main/java/module-info.java b/src/main/java/module-info.java
index 66cd3cb..3f7b95a 100644
--- a/src/main/java/module-info.java
+++ b/src/main/java/module-info.java
@@ -8,6 +8,7 @@ module praktiKST {
     requires jdk.jsobject;
     requires java.net.http;
     requires java.desktop;
+	requires jdk.crypto.ec;
     exports kst4contest.controller.interfaces;
     exports kst4contest.controller;
 	exports kst4contest.locatorUtils;