diff --git a/public/lib/leaflet.markercluster/example/screen.css b/public/lib/leaflet.markercluster/example/screen.css
index c89cba86c4..b5479792cf 100644
--- a/public/lib/leaflet.markercluster/example/screen.css
+++ b/public/lib/leaflet.markercluster/example/screen.css
@@ -1,5 +1,5 @@
 #map {
-	width: 800px; 
+	width: 100%; 
 	height: 600px; 
 	border: 1px solid #ccc;
 }