diff --git a/composer.json b/composer.json
index 9ed88b2..033867b 100644
--- a/composer.json
+++ b/composer.json
@@ -18,8 +18,8 @@
     }
   ],
   "require":{
-    "php":">=7.1",
-    "contao/core-bundle":"^4.4",
+    "php":"^7.4 || ^8.0",
+    "contao/core-bundle":"^4.9",
     "contao-estatemanager/core": "^1.0"
   },
   "require-dev": {
diff --git a/src/Resources/contao/config/config.php b/src/Resources/contao/config/config.php
index 1083400..c36adfd 100644
--- a/src/Resources/contao/config/config.php
+++ b/src/Resources/contao/config/config.php
@@ -11,10 +11,13 @@
 // ESTATEMANAGER
 $GLOBALS['TL_ESTATEMANAGER_ADDONS'][] = array('ContaoEstateManager\WibImport', 'AddonManager');
 
-if(ContaoEstateManager\WibImport\AddonManager::valid()) {
+use ContaoEstateManager\WibImport\AddonManager;
+use ContaoEstateManager\WibImport\WibImport;
+
+if(AddonManager::valid()) {
     // HOOKS
-    $GLOBALS['TL_HOOKS']['realEstateImportBeforeSync'][]       = array('ContaoEstateManager\WibImport\WibImport', 'manuallyDownloadOpenImmoFile');
-    $GLOBALS['TL_HOOKS']['realEstateImportBeforeCronSync'][]   = array('ContaoEstateManager\WibImport\WibImport', 'downloadOpenImmoFile');
-    $GLOBALS['TL_HOOKS']['realEstateImportPrePrepareRecord'][] = array('ContaoEstateManager\WibImport\WibImport', 'skipPartnerRecord');
-    $GLOBALS['TL_HOOKS']['realEstateImportSaveImage'][]        = array('ContaoEstateManager\WibImport\WibImport', 'downloadImage');
+    $GLOBALS['TL_HOOKS']['realEstateImportBeforeSync'][]       = array(WibImport::class, 'manuallyDownloadOpenImmoFile');
+    $GLOBALS['TL_HOOKS']['realEstateImportBeforeCronSync'][]   = array(WibImport::class, 'downloadOpenImmoFile');
+    $GLOBALS['TL_HOOKS']['realEstateImportPrePrepareRecord'][] = array(WibImport::class, 'skipPartnerRecord');
+    $GLOBALS['TL_HOOKS']['realEstateImportSaveImage'][]        = array(WibImport::class, 'downloadImage');
 }