diff --git a/src/SPC/store/source/PhpSource.php b/src/SPC/store/source/PhpSource.php
index 02ba8755..bf33d6b7 100644
--- a/src/SPC/store/source/PhpSource.php
+++ b/src/SPC/store/source/PhpSource.php
@@ -20,7 +20,7 @@ class PhpSource extends CustomSourceBase
 
     public function fetch(bool $force = false, ?array $config = null, int $lock_as = SPC_DOWNLOAD_SOURCE): void
     {
-        $major = defined('SPC_BUILD_PHP_VERSION') ? SPC_BUILD_PHP_VERSION : '8.4';
+        $major = defined('SPC_BUILD_PHP_VERSION') ? SPC_BUILD_PHP_VERSION : '8.5';
         if ($major === 'git') {
             Downloader::downloadSource('php-src', ['type' => 'git', 'url' => 'https://github.com/php/php-src.git', 'rev' => 'master'], $force);
         } else {