namespace Rapsys\PackBundle;
 
-use Symfony\Component\DependencyInjection\Container;
+use Symfony\Component\DependencyInjection\Extension\ExtensionInterface;
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 
+use Rapsys\PackBundle\DependencyInjection\RapsysPackExtension;
+
 /**
  * {@inheritdoc}
  */
 class RapsysPackBundle extends Bundle {
+       /**
+        * {@inheritdoc}
+        */
+       public function getContainerExtension(): ?ExtensionInterface {
+               //Return created container extension
+               return $this->createContainerExtension();
+       }
+
        /**
         * Return bundle alias
         *
                        $bpos = strlen(static::class) - $npos;
                }
 
-               //Return underscored lowercase bundle alias
-               return Container::underscore(substr(static::class, $npos, $bpos));
+               //Return lowercase bundle alias
+               return strtolower(substr(static::class, $npos, $bpos));
        }
 
        /**
         */
        public static function getVersion(): string {
                //Return version
-               return '0.2.5';
+               return '0.4.0';
        }
 }