diff --git a/ui/app/models/pki-certificate.js b/ui/app/models/pki-certificate.js
index 5bcd2dc944..751dc39eea 100644
--- a/ui/app/models/pki-certificate.js
+++ b/ui/app/models/pki-certificate.js
@@ -53,6 +53,7 @@ export default DS.Model.extend({
   ttl: attr({
     label: 'TTL',
     editType: 'ttl',
+    defaultValue: '720h',
   }),
 
   format: attr('string', {