diff --git a/src/DependencyInjection/Pass/RegisterEncodersPass.php b/src/DependencyInjection/Pass/RegisterEncodersPass.php
index 4281f4e..b3efa8a 100644
--- a/src/DependencyInjection/Pass/RegisterEncodersPass.php
+++ b/src/DependencyInjection/Pass/RegisterEncodersPass.php
@@ -37,7 +37,7 @@ class RegisterEncodersPass implements CompilerPassInterface
         $definition = $container->getDefinition('netzmacht.contao_leaflet_maps.definition.builder.event_dispatcher');
         $serviceIds = $container->findTaggedServiceIds('netzmacht.contao_leaflet_maps.encoder');
 
-        foreach ($serviceIds as $serviceId => $tags) {
+        foreach (array_keys($serviceIds) as $serviceId) {
             $definition->addMethodCall('addSubscriber', [new Reference($serviceId)]);
         }
     }
diff --git a/src/Listener/LoadAssetsListener.php b/src/Listener/LoadAssetsListener.php
index 62907a2..1192315 100644
--- a/src/Listener/LoadAssetsListener.php
+++ b/src/Listener/LoadAssetsListener.php
@@ -60,6 +60,7 @@ class LoadAssetsListener
     {
         $this->assets           = $assets;
         $this->definitionMapper = $definitionMapper;
+        $this->libraries        = $libraries;
     }
 
     /**