diff --git a/security/acme-client/src/opnsense/scripts/OPNsense/AcmeClient/upload_sftp.php b/security/acme-client/src/opnsense/scripts/OPNsense/AcmeClient/upload_sftp.php
index aa86faa3c..5bef2ceac 100644
--- a/security/acme-client/src/opnsense/scripts/OPNsense/AcmeClient/upload_sftp.php
+++ b/security/acme-client/src/opnsense/scripts/OPNsense/AcmeClient/upload_sftp.php
@@ -110,8 +110,8 @@ const EXAMPLES = <<<TXT
 TXT;
 
 // Permissions
-const DEFAULT_CERT_MODE = 0440;
-const DEFAULT_KEY_MODE = 0400;
+const DEFAULT_CERT_MODE = '0440';
+const DEFAULT_KEY_MODE = '0400';
 
 // Names
 const UPLOAD_NAME_TEMPLATES = [