diff --git a/site.conf b/site.conf
index 5c10f2a..00392dc 100644
--- a/site.conf
+++ b/site.conf
@@ -10,6 +10,7 @@
 		'1.ntp.services.bremen.freifunk.net',
 		'2.ntp.services.bremen.freifunk.net',
 		'3.ntp.services.bremen.freifunk.net',
+		'4.ntp.services.bremen.freifunk.net',
 		'5.ntp.services.bremen.freifunk.net',
 		'6.ntp.services.bremen.freifunk.net',
 	},