diff --git a/site.conf b/site.conf
index 75047ba363fa52308466d6e1d0391e9db334e039..74fa258d6984e755ac1bca5412e04fb067a205a3 100644
--- a/site.conf
+++ b/site.conf
@@ -7,7 +7,7 @@
 		openwrt = 'http://openwrt.draic.info/%n/%v/%S/packages',
 	},
 
-	prefix4 = '10.18.0.0/17',
+	prefix4 = '10.18.0.0/16',
 	prefix6 = 'fd74:fdaa:9dc4::/64',
 
 	mesh_on_wan = false,