diff --git a/dns/nixos.org.js b/dns/nixos.org.js
index 08c194ad..7ff6ab8b 100644
--- a/dns/nixos.org.js
+++ b/dns/nixos.org.js
@@ -46,12 +46,12 @@ D("nixos.org",
 	CNAME("_acme-challenge.artifacts", "bsk6mjvi6b1r6wekb0.fastly-validations.com."),
 	CNAME("_acme-challenge.releases", "s731ezp9ameh5f349b.fastly-validations.com."),
 	CNAME("_acme-challenge.tarballs", "vnqm62k5sjx9jogeqg.fastly-validations.com."),
-	CNAME("cache", "dualstack.v2.shared.global.fastly.net."),
-	CNAME("cache-staging", "dualstack.v2.shared.global.fastly.net."),
-	CNAME("channels", "dualstack.v2.shared.global.fastly.net."),
-	CNAME("artifacts", "dualstack.v2.shared.global.fastly.net."),
-	CNAME("releases", "dualstack.v2.shared.global.fastly.net."),
-	CNAME("tarballs", "dualstack.v2.shared.global.fastly.net."),
+	CNAME("cache", "dualstack.v2.shared.global.fastly.net.", TTL(300)),
+	CNAME("cache-staging", "dualstack.v2.shared.global.fastly.net.", TTL(300)),
+	CNAME("channels", "dualstack.v2.shared.global.fastly.net.", TTL(300)),
+	CNAME("artifacts", "dualstack.v2.shared.global.fastly.net.", TTL(300)),
+	CNAME("releases", "dualstack.v2.shared.global.fastly.net.", TTL(300)),
+	CNAME("tarballs", "dualstack.v2.shared.global.fastly.net.", TTL(300)),
 
 	// hydra.nixos.org
 	A("haumea", "46.4.89.205"),