diff --git a/main.js b/main.js
index db024b94..98e1160b 100644
--- a/main.js
+++ b/main.js
@@ -132,7 +132,7 @@ window.ZOOM_LEVEL_ADJ = 5; // add 5 seconds per zoom level
 window.ON_MOVE_REFRESH = 2.5;  //refresh time to use after a movement event
 window.MINIMUM_OVERRIDE_REFRESH = 10; //limit on refresh time since previous refresh, limiting repeated move refresh rate
 window.REFRESH_GAME_SCORE = 15*60; // refresh game score every 15 minutes
-window.MAX_IDLE_TIME = 4*60; // stop updating map after 4min idling
+window.MAX_IDLE_TIME = 15*60; // stop updating map after 15min idling
 window.HIDDEN_SCROLLBAR_ASSUMED_WIDTH = 20;
 window.SIDEBAR_WIDTH = 300;