diff --git a/.gitignore b/.gitignore
index 9f11b75..ea5835d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,4 @@
 .idea/
+.Build
+composer.lock
+vendor
\ No newline at end of file
diff --git a/Classes/Hooks/Backend/Toolbar/ClearCacheActionsHook.php b/Classes/Hooks/Backend/Toolbar/ClearCacheActionsHook.php
index ec7b5cb..a355de4 100644
--- a/Classes/Hooks/Backend/Toolbar/ClearCacheActionsHook.php
+++ b/Classes/Hooks/Backend/Toolbar/ClearCacheActionsHook.php
@@ -8,6 +8,7 @@
 namespace KayStrobach\Dyncss\Hooks\Backend\Toolbar;
 
 use TYPO3\CMS\Backend\Toolbar\ClearCacheActionsHookInterface;
+use TYPO3\CMS\Core\Core\Environment;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
 use TYPO3\CMS\Core\Authentication\BackendUserAuthentication;
 use TYPO3\CMS\Backend\Routing\UriBuilder;
@@ -26,7 +27,7 @@ class ClearCacheActionsHook implements ClearCacheActionsHookInterface
     public function manipulateCacheActions(&$cacheActions, &$optionValues)
     {
         $clearCacheSystemUser = (bool)($this->getBackendUser()->getTSConfig()['options.']['clearCache.']['system'] ?? false);
-        $isDevelopment = GeneralUtility::getApplicationContext()->isDevelopment();
+        $isDevelopment = Environment::getContext()->isDevelopment();
         $clearCacheSystemSys = (bool)$GLOBALS['TYPO3_CONF_VARS']['SYS']['clearCacheSystem'] === true;
         $isAdmin = $this->getBackendUser()->isAdmin();
         if ($clearCacheSystemUser || $isDevelopment || ($clearCacheSystemSys && $isAdmin)) {