diff --git a/src/www/system_certmanager.php b/src/www/system_certmanager.php
index 7f1dece61..60d741947 100644
--- a/src/www/system_certmanager.php
+++ b/src/www/system_certmanager.php
@@ -29,7 +29,12 @@
 
 require_once('guiconfig.inc');
 require_once('system.inc');
-require_once('phpseclib/vendor/autoload.php');
+require_once('phpseclib/File/X509.php');
+require_once('phpseclib/File/ASN1.php');
+require_once('phpseclib/Math/BigInteger.php');
+require_once('phpseclib/File/ASN1/Element.php');
+require_once('phpseclib/Crypt/RSA.php');
+require_once('phpseclib/Crypt/Hash.php');
 
 function csr_generate(&$cert, $keylen, $dn, $digest_alg = 'sha256')
 {