diff --git a/Classes/Package.php b/Classes/Package.php
index 708c39d..fe794bb 100644
--- a/Classes/Package.php
+++ b/Classes/Package.php
@@ -6,7 +6,7 @@
 use Neos\Flow\Core\Bootstrap;
 use Neos\Flow\Monitor\FileMonitor;
 use Neos\Flow\Package\Package as BasePackage;
-use Neos\Flow\Package\PackageManagerInterface;
+use Neos\Flow\Package\PackageManager;
 use Neos\Fusion\Core\Cache\FileMonitorListener;
 
 class Package extends BasePackage
@@ -20,7 +20,7 @@ public function boot(Bootstrap $bootstrap)
             $dispatcher->connect(Sequence::class, 'afterInvokeStep', function ($step) use ($bootstrap, $dispatcher) {
                 if ($step->getIdentifier() === 'neos.flow:systemfilemonitor') {
                     $fileMonitor = FileMonitor::createFileMonitorAtBoot('Fusion_Files', $bootstrap);
-                    $packageManager = $bootstrap->getEarlyInstance(PackageManagerInterface::class);
+                    $packageManager = $bootstrap->getEarlyInstance(PackageManager::class);
                     foreach ($packageManager->getFlowPackages() as $packageKey => $package) {
                         if ($packageManager->isPackageFrozen($packageKey)) {
                             continue;