diff --git a/src/neighbor/neighborInteract.js b/src/neighbor/neighborInteract.js
index 6c86d886c0dbccf36a196c34f281dc541bebbb4e..ae251c972d706d15ef29238cdd7dd659e1548d20 100644
--- a/src/neighbor/neighborInteract.js
+++ b/src/neighbor/neighborInteract.js
@@ -5,7 +5,7 @@ App.Neighbor.Interact = (function() {
 	 * @returns {DocumentFragment}
 	 */
 	function list() {
-		V.arcologies.forEach((a) => a.prosperity = Math.clamp(a.prosperity, 1, 300));
+		V.arcologies.forEach((a) => a.prosperity = Math.clamp(a.prosperity, 1, 400));
 		if (!V.activeArcologyIdx) {
 			V.activeArcologyIdx = 0;
 		}