diff --git a/src/Badoo/SoftMocks.php b/src/Badoo/SoftMocks.php
index d99806e..06235e7 100644
--- a/src/Badoo/SoftMocks.php
+++ b/src/Badoo/SoftMocks.php
@@ -710,10 +710,12 @@ protected static function initParserVersion()
                 "Can't parse installed packages json for get nikic/php-parser version for for right rewritten files cache: {$error}"
             );
         }
-        // in composer 2 packages are stored in 'packages' key.
-        // composer-runtime-api could be used for this check, but it is available for composer 2 only
-        $packages = $installed['packages'] ?? $installed;
-        foreach ($packages as $package) {
+        
+        // If the installed.json is the latest version then update the installed variable
+        if (array_key_exists('packages', $installed)) {
+            $installed = $installed['packages'];
+        }
+        foreach ($installed as $package) {
             if (!isset($package['name'], $package['version'])) {
                 continue;
             }