diff --git a/deployment/roles/oidc_idp/templates/idp_config.toml.j2 b/deployment/roles/oidc_idp/templates/idp_config.toml.j2
index 15ecba1..0283eac 100644
--- a/deployment/roles/oidc_idp/templates/idp_config.toml.j2
+++ b/deployment/roles/oidc_idp/templates/idp_config.toml.j2
@@ -9,4 +9,4 @@ certificate = "{{ idp_tls.cert }}"
 key = "{{ idp_tls.key }}"
 
 [admin]
-url = "https://{{ oidc_urls.hydra_admin.address | default("localhost") }}:{{ oidc_urls.hydra_admin.port | default("3000") }}"
+url = "https://{{ oidc_urls.hydra_admin.address | default("hydra.cacert.localhost") }}:{{ oidc_urls.hydra_admin.port | default("3000") }}"