diff --git a/db/seeds/data/permitted_domains.yml b/db/seeds/data/permitted_domains.yml
index 035b21b50..ae33ff732 100644
--- a/db/seeds/data/permitted_domains.yml
+++ b/db/seeds/data/permitted_domains.yml
@@ -11,3 +11,4 @@
 - csc.gov.uk
 - lordsappointments.gov.uk
 - public-standards.gov.uk
+- cert.gov.uk