diff --git a/code/boot.js b/code/boot.js
index c7ee7ee6..d627e8aa 100644
--- a/code/boot.js
+++ b/code/boot.js
@@ -129,7 +129,7 @@ window.setupMap = function() {
 
 
   window.map = new L.Map('map', $.extend(getPosition(),
-    {zoomControl: window.showZoom}
+    {zoomControl: window.showZoom, minZoom: 1, maxZoom: 22}
   ));
 
   // add empty div to leaflet control areas - to force other leaflet controls to move around IITC UI elements