diff --git a/README.md b/README.md
index 9ebc487..fc1ba62 100644
--- a/README.md
+++ b/README.md
@@ -62,6 +62,11 @@ area. Values like 1.0 and 0.5 might be good choices.
 
 Setting this to `false` will hide contact information for nodes.
 
+## maxAge (integer)
+
+Nodes being online for less than maxAge days are considered "new". Likewise,
+nodes being offline for less than than maxAge days are considered "lost".
+
 # Building
 
 Just run the following command from the meshviewer directory:
diff --git a/config.js.example b/config.js.example
index eeaa8fa..60dee6a 100644
--- a/config.js.example
+++ b/config.js.example
@@ -2,5 +2,6 @@ define({
   "dataPath": "https://map.luebeck.freifunk.net/data/",
   "siteName": "Freifunk Lübeck",
   "mapSigmaScale": 0.5,
-  "showContact": true
+  "showContact": true,
+  "maxAge": 14
 })
diff --git a/lib/main.js b/lib/main.js
index 1d12c49..bb2e740 100644
--- a/lib/main.js
+++ b/lib/main.js
@@ -22,7 +22,7 @@ function (config, moment, Router, L, GUI, numeral) {
       })
 
       var now = moment()
-      var age = moment(now).subtract(14, "days")
+      var age = moment(now).subtract(config.maxAge, "days")
 
       var newnodes = limit("firstseen", age, sortByKey("firstseen", nodes).filter(online))
       var lostnodes = limit("lastseen", age, sortByKey("lastseen", nodes).filter(offline))