diff --git a/kubernetes/teyvat/apps/security/authentik/ks.yaml b/kubernetes/teyvat/apps/security/authentik/ks.yaml
index ed8dbcdb01..10609f82ce 100644
--- a/kubernetes/teyvat/apps/security/authentik/ks.yaml
+++ b/kubernetes/teyvat/apps/security/authentik/ks.yaml
@@ -27,3 +27,4 @@ spec:
   postBuild:
     substitute:
       APP: *app
+      GATUS_SUBDOMAIN: sso