diff --git a/README.md b/README.md
index fc7a7c4..348ff39 100644
--- a/README.md
+++ b/README.md
@@ -42,15 +42,8 @@ Database user.
 ## DB_PASSWORD
 Password for the database user.
 
-## CERT_NAME
-- default: fullchain.pem
-
-Name of the certificate file.
-
-## KEY_NAME
-- default: privkey.pem
-
-Name of the key file.
+## CERT_DOMAIN
+Name of the certificate domain.
 
 ## MAX_UPLOAD_SIZE
 - default: 10M
diff --git a/rootfs/etc/confd/templates/server.yaml.tmpl b/rootfs/etc/confd/templates/server.yaml.tmpl
index 1f2ab5c..e98efda 100644
--- a/rootfs/etc/confd/templates/server.yaml.tmpl
+++ b/rootfs/etc/confd/templates/server.yaml.tmpl
@@ -1,5 +1,6 @@
-tls_certificate_path: "/etc/ssl/matrix-synapse/{{getenv "CERT_NAME" "fullchain.pem"}}"
-tls_private_key_path: "/etc/ssl/matrix-synapse/{{getenv "KEY_NAME" "privkey.pem"}}"
+tls_certificate_path: "/etc/ssl/matrix-synapse/{{getenv "CERT_DOMAIN"}}.crt"
+tls_private_key_path: "/etc/ssl/matrix-synapse/{{getenv "CERT_DOMAIN"}}.key"
+
 tls_dh_params_path: "/var/lib/matrix-synapse/signing/dhparams.pem"
 no_tls: False