diff --git a/build.default.properties b/build.default.properties
index 06357d7..c08524f 100644
--- a/build.default.properties
+++ b/build.default.properties
@@ -1,4 +1,4 @@
 phpcs.standard  = ${basedir}/vendor/phpcq/coding-standard/phpcs/PhpCodeQuality/ruleset.xml
 phpmd.ruleset   = ${basedir}/vendor/phpcq/coding-standard/phpmd/ruleset.xml
-phpcs.excluded  = src/Resources/contao/languages
+phpcs.excluded  = src/Resources/contao/languages,src/Resources/public/js
 phpcpd.excluded = contao
diff --git a/src/Frontend/Assets/LibrariesConfiguration.php b/src/Frontend/Assets/LibrariesConfiguration.php
index 2709f7c..94ad1b9 100644
--- a/src/Frontend/Assets/LibrariesConfiguration.php
+++ b/src/Frontend/Assets/LibrariesConfiguration.php
@@ -15,16 +15,17 @@ declare(strict_types=1);
 namespace Netzmacht\Contao\Leaflet\Frontend\Assets;
 
 use Contao\CoreBundle\Framework\ContaoFrameworkInterface as ContaoFramework;
-use Traversable;
 
 /**
- * Class LibrariesConfiguration
+ * Class LibrariesConfiguration.
  *
  * @package Netzmacht\Contao\Leaflet\Frontend\Assets
  */
 class LibrariesConfiguration implements \IteratorAggregate, \ArrayAccess
 {
     /**
+     * Contao framework.
+     *
      * @var ContaoFramework
      */
     private $framework;
@@ -32,7 +33,7 @@ class LibrariesConfiguration implements \IteratorAggregate, \ArrayAccess
     /**
      * LibrariesConfiguration constructor.
      *
-     * @param ContaoFramework $framework
+     * @param ContaoFramework $framework Contao framework.
      */
     public function __construct(ContaoFramework $framework)
     {
@@ -70,6 +71,8 @@ class LibrariesConfiguration implements \IteratorAggregate, \ArrayAccess
      */
     public function offsetGet($offset)
     {
+        $this->framework->initialize();
+
         return $GLOBALS['LEAFLET_LIBRARIES'][$offset];
     }
 
@@ -80,6 +83,8 @@ class LibrariesConfiguration implements \IteratorAggregate, \ArrayAccess
      */
     public function offsetSet($offset, $value)
     {
+        $this->framework->initialize();
+
         $GLOBALS['LEAFLET_LIBRARIES'][$offset] = $value;
     }
 
@@ -90,6 +95,8 @@ class LibrariesConfiguration implements \IteratorAggregate, \ArrayAccess
      */
     public function offsetUnset($offset)
     {
+        $this->framework->initialize();
+
         unset($GLOBALS['LEAFLET_LIBRARIES'][$offset]);
     }
 }
diff --git a/src/MapProvider.php b/src/MapProvider.php
index 99192ee..631b404 100644
--- a/src/MapProvider.php
+++ b/src/MapProvider.php
@@ -95,7 +95,7 @@ class MapProvider
      * @param DefinitionMapper $mapper          The definition mapper.
      * @param Leaflet          $leaflet         The Leaflet instance.
      * @param EventDispatcher  $eventDispatcher The Contao event dispatcher.
-     * @param Input           $input           Thw request input.
+     * @param Input            $input           Thw request input.
      * @param ContaoAssets     $assets          Assets handler.
      * @param Cache            $cache           Cache.
      * @param array            $filters         Request filters configuration.
diff --git a/src/Resources/contao/config/config.php b/src/Resources/contao/config/config.php
index 2e00219..8d928ec 100644
--- a/src/Resources/contao/config/config.php
+++ b/src/Resources/contao/config/config.php
@@ -88,6 +88,7 @@ $GLOBALS['TL_MODELS']['tl_leaflet_vector']  = \Netzmacht\Contao\Leaflet\Model\Ve
 /*
  * Hooks.
  */
+
 $GLOBALS['TL_HOOKS']['initializeSystem'][] = [
     'netzmacht.contao_leaflet_maps.listeners.register_libraries',
     'onInitializeSystem'