diff --git a/ext_localconf.php b/ext_localconf.php
index 434f4fbd..2efe2301 100644
--- a/ext_localconf.php
+++ b/ext_localconf.php
@@ -89,18 +89,12 @@
 
 // Load Extension Manager settings
 (function (): void {
-    $extensionConfiguration = [];
-
-    if (class_exists(\TYPO3\CMS\Core\Configuration\ExtensionConfiguration::class)) {
-        try {
-            $extensionConfiguration = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\Configuration\ExtensionConfiguration::class)
-                ->get('searchable');
-        } catch (\TYPO3\CMS\Core\Configuration\Exception\ExtensionConfigurationExtensionNotConfiguredException $e) {
-            $extensionConfiguration = [];
-        }
-    } else {
-        $extensionConfiguration = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(\TYPO3\CMS\Core\TypoScript\TypoScriptService::class)
-            ->convertTypoScriptArrayToPlainArray(unserialize($_EXTCONF));
+    try {
+        $extensionConfiguration = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(
+            \TYPO3\CMS\Core\Configuration\ExtensionConfiguration::class
+        )->get('searchable');
+    } catch (\TYPO3\CMS\Core\Configuration\Exception\ExtensionConfigurationExtensionNotConfiguredException $e) {
+        $extensionConfiguration = [];
     }
 
     foreach ($extensionConfiguration as $key => $value) {
diff --git a/phpstan.neon b/phpstan.neon
index 83835853..28ebd495 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -14,8 +14,6 @@ parameters:
       path: ext_emconf.php
     - message: '#Undefined variable: \$_EXTCONF#'
       path: ext_localconf.php
-    - message: '#TYPO3\\CMS\\Core\\Configuration\\Exception\\ExtensionConfigurationExtensionNotConfiguredException#'
-      path: ext_localconf.php
     - message: '#Psr\\Http\\Server\\MiddlewareInterface#'
       path: Classes/Middleware/UriBuilder.php
     - message: '#TYPO3\\CMS\\Core\\Context\\.+#'