diff --git a/security/acme-client/pkg-descr b/security/acme-client/pkg-descr
index 9e90b9e38..788a21e8a 100644
--- a/security/acme-client/pkg-descr
+++ b/security/acme-client/pkg-descr
@@ -8,6 +8,11 @@ WWW: https://github.com/acmesh-official/acme.sh
 Plugin Changelog
 ================
 
+2.1
+
+Fixed:
+* fix creation of nsupdate secrets file
+
 2.0
 
 Added:
diff --git a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsNsupdate.php b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsNsupdate.php
index 5fe117e5e..4d6f349d5 100644
--- a/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsNsupdate.php
+++ b/security/acme-client/src/opnsense/mvc/app/library/OPNsense/AcmeClient/LeValidation/DnsNsupdate.php
@@ -39,9 +39,9 @@ class DnsNsupdate extends Base implements LeValidationInterface
 {
     public function prepare()
     {
-        $configdir = (string)sprintf(self::ACME_CONFIG_DIR, $this->cert_uuid);
+        $configdir = (string)sprintf(self::ACME_CONFIG_DIR, $this->cert_id);
         $secret_key_filename = "${configdir}/secret.key";
-        $secret_key_data = (string)$this->config->dns_nsupdate_key . '\n';
+        $secret_key_data = (string)$this->config->dns_nsupdate_key . "\n";
         file_put_contents($secret_key_filename, $secret_key_data);
 
         // Add env variables