diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f7795a..50b149c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -368,3 +368,7 @@
 * 2.9.12 -- 2023-11-01
   - vpc-interface-endpoint
     - change vpce_kms_txt to vpce_heritage_txt
+
+* 2.9.13 -- 2023-12-13
+  - vpn-transit-gateway
+    - change alarm templates to reduce size for aggregate alarms
diff --git a/vpn-transit-gateway/templates/vpn_tunnel_status_composite.alarm.tpl b/vpn-transit-gateway/templates/vpn_tunnel_status_composite.alarm.tpl
index b81d7b6..820a6cb 100644
--- a/vpn-transit-gateway/templates/vpn_tunnel_status_composite.alarm.tpl
+++ b/vpn-transit-gateway/templates/vpn_tunnel_status_composite.alarm.tpl
@@ -12,7 +12,7 @@
   * loopback         = ${site_details[0].loopback}
   * endpoint         = ${site_details[0].customer_address}
 %{ for t in site_details ~}
-  * ${t.site} ${t.tunnel_number} ${t.inside_cidr}
+  * ${t.site}-${t.sequence}-${t.tunnel_number} 
 %{ endfor ~}
 
 _${module_version}_
diff --git a/vpn-transit-gateway/templates/vpn_tunnel_status_composite_site.alarm.tpl b/vpn-transit-gateway/templates/vpn_tunnel_status_composite_site.alarm.tpl
index 21648ad..cb0a5b7 100644
--- a/vpn-transit-gateway/templates/vpn_tunnel_status_composite_site.alarm.tpl
+++ b/vpn-transit-gateway/templates/vpn_tunnel_status_composite_site.alarm.tpl
@@ -13,8 +13,7 @@
   * loopback         = ${site_details[0].loopback}
   * endpoint         = ${site_details[0].customer_address}
 %{ for t in site_details ~}
-  * ${t.tunnel_number} ${t.inside_cidr} interface ${t.interface_number}
+  * ${t.sequence}-${t.tunnel_number} ${t.inside_cidr} interface ${t.interface_number}
 %{ endfor ~}
 
 _${module_version}_
-