diff --git a/domains/ffhb_batv15.conf b/domains/ffhb_batv15.conf
index 0a19854..40e73fb 100644
--- a/domains/ffhb_batv15.conf
+++ b/domains/ffhb_batv15.conf
@@ -12,6 +12,7 @@
 		'10.ntp.bremen.freifunk.net',
 	},
 	dns = {
+		cacheentries = 5000,
 		servers = {
 			'fd2f:5119:0f2c::7',
 			'fd2f:5119:0f2c::8',