diff --git a/dns/main.tf b/dns/main.tf
index 82e9d3b..468709b 100644
--- a/dns/main.tf
+++ b/dns/main.tf
@@ -34,6 +34,7 @@ resource "linode_domain_record" "kn_linode_dallas_ingress_v4" {
 	name = "kn-linode-dallas.ingress"
 	record_type = "A"
 	target = "50.116.20.32"
+	ttl_sec = 30
 }
 
 resource "linode_domain_record" "kn_linode_dallas_ingress_v6" {
@@ -41,6 +42,7 @@ resource "linode_domain_record" "kn_linode_dallas_ingress_v6" {
 	name = "kn-linode-dallas.ingress"
 	record_type = "AAAA"
 	target = "2600:3c00::f03c:93ff:fee2:d097"
+	ttl_sec = 30
 }
 
 // Treehouse cluster: kn-oci-sanjose
@@ -50,6 +52,7 @@ resource "linode_domain_record" "kn_oci_sanjose_ingress_v4" {
 	name = "kn-oci-sanjose.ingress"
 	record_type = "A"
 	target = "152.67.234.163"
+	ttl_sec = 30
 }
 
 resource "linode_domain_record" "kn_oci_sanjose_ingress_v6" {
@@ -57,6 +60,7 @@ resource "linode_domain_record" "kn_oci_sanjose_ingress_v6" {
 	name = "kn-oci-sanjose.ingress"
 	record_type = "AAAA"
 	target = "2603:c024:c000:100::80"
+	ttl_sec = 30
 }
 
 // Treehouse services: Gitea
@@ -65,6 +69,7 @@ resource "linode_domain_record" "gitea_v4" {
 	name = "gitea"
 	record_type = "A"
 	target = "104.250.236.2"
+	ttl_sec = 30
 }
 
 resource "linode_domain_record" "gitea_v6" {
@@ -72,6 +77,7 @@ resource "linode_domain_record" "gitea_v6" {
 	name = "gitea"
 	record_type = "AAAA"
 	target = "2602:fd37:1:0:104:250:236:2"
+	ttl_sec = 30
 }
 
 resource "linode_domain_record" "woodpecker_cname" {
@@ -79,6 +85,7 @@ resource "linode_domain_record" "woodpecker_cname" {
 	name = "woodpecker"
 	record_type = "CNAME"
 	target = "gitea.treehouse.systems"
+	ttl_sec = 30
 }
 
 // Treehouse services: Mastodon (running on kn-linode-dallas)
@@ -87,6 +94,7 @@ resource "linode_domain_record" "social_cname" {
 	name = "social"
 	record_type = "CNAME"
 	target = "kn-linode-dallas.ingress.treehouse.systems"
+	ttl_sec = 30
 }
 
 resource "linode_domain_record" "cache_cname" {
@@ -94,6 +102,7 @@ resource "linode_domain_record" "cache_cname" {
 	name = "cache"
 	record_type = "CNAME"
 	target = "treehousesystems.b-cdn.net"
+	ttl_sec = 30
 }
 
 // Treehouse services: Discord redirector.
@@ -105,6 +114,7 @@ resource "linode_domain_record" "discord_cname" {
 	name = "discord"
 	record_type = "CNAME"
 	target = "kn-oci-sanjose.ingress.treehouse.systems"
+	ttl_sec = 30
 }
 
 // Treehouse services: Minecraft (OVH, managed by Kenneth)
@@ -113,6 +123,7 @@ resource "linode_domain_record" "minecraft_cname" {
 	name = "survival.minecraft"
 	record_type = "CNAME"
 	target = "survival.treehouse.fork.run"
+	ttl_sec = 30
 }
 
 // Apex domain settings.
@@ -121,6 +132,7 @@ resource "linode_domain_record" "apex_v4" {
 	name = ""
 	record_type = "A"
 	target = "152.67.234.163"
+	ttl_sec = 30
 }
 
 resource "linode_domain_record" "apex_v6" {
@@ -128,6 +140,7 @@ resource "linode_domain_record" "apex_v6" {
 	name = ""
 	record_type = "AAAA"
 	target = "2603:c024:c000:100::80"
+	ttl_sec = 30
 }
 
 resource "linode_domain_record" "apex_mx" {
@@ -136,6 +149,7 @@ resource "linode_domain_record" "apex_mx" {
 	record_type = "MX"
 	target = "mx1.mailbun.net"
 	priority = "5"
+	ttl_sec = 30
 }
 
 resource "linode_domain_record" "apex_spf" {
@@ -143,6 +157,7 @@ resource "linode_domain_record" "apex_spf" {
 	name = ""
 	record_type = "TXT"
 	target = "v=spf1 a mx include:spf.mailbun.net ~all"
+	ttl_sec = 30
 }
 
 resource "linode_domain_record" "apex_dmarc" {
@@ -150,6 +165,7 @@ resource "linode_domain_record" "apex_dmarc" {
 	name = "_dmarc"
 	record_type = "TXT"
 	target = "v=DMARC1; p=none; fo=1; rua=mailto:admin@treehouse.systems"
+	ttl_sec = 30
 }
 
 resource "linode_domain_record" "apex_domainkey" {
@@ -157,4 +173,5 @@ resource "linode_domain_record" "apex_domainkey" {
 	name = "mailbun._domainkey"
 	record_type = "TXT"
 	target = "v=DKIM1; k=rsa; s=email; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAlJGZN1aCAUd8CqyQA7Akzkvns+Wq/w70ft2xr0B8jFp0DtW8BtyLLAsErpIp5ZTDgReYGgL7cNcSsNQRn+d6ZaOBGlC/gH1T3KYfbsvavOdnbGx9gofi6x8I5QOOLhp7epK5YkaP/Igg58Zm0ni3jdeMCuX+qkJVqn2WVv8IcRtIA3zJrTYOW3lGCj1ieezl5ref+43mFvcUqidToR9XyHNmi1RowmWAofbZASXkNqZiR1P2Jw3s7q6p0fAEz6bODNOmngIlRAaKjBfDVezsaTeQJwsMg9g58GigVTSb9gMHRZon61yxWcCJtcivPug7xAVlVU+MMkDr7MfvUke5KQIDAQAB"
+	ttl_sec = 30
 }