diff --git a/src/Listener/LocatorRegistrationListener.php b/src/Listener/LocatorRegistrationListener.php
index def065c..6c04df3 100644
--- a/src/Listener/LocatorRegistrationListener.php
+++ b/src/Listener/LocatorRegistrationListener.php
@@ -15,6 +15,7 @@
 use Zend\EventManager\ListenerAggregateInterface;
 use Zend\ModuleManager\Feature\LocatorRegisteredInterface;
 use Zend\ModuleManager\ModuleEvent;
+use Zend\Mvc\MvcEvent;
 
 /**
  * Locator registration listener
@@ -67,7 +68,7 @@ public function onLoadModulesPost(Event $e)
         $events        = $moduleManager->getEventManager()->getSharedManager();
 
         // Shared instance for module manager
-        $events->attach('Zend\Mvc\Application', 'bootstrap', function ($e) use ($moduleManager) {
+        $events->attach('Zend\Mvc\Application', MvcEvent::EVENT_BOOTSTRAP, function ($e) use ($moduleManager) {
             $moduleClassName = get_class($moduleManager);
             $application     = $e->getApplication();
             $services        = $application->getServiceManager();
@@ -81,7 +82,7 @@ public function onLoadModulesPost(Event $e)
         }
 
         // Attach to the bootstrap event if there are modules we need to process
-        $events->attach('Zend\Mvc\Application', 'bootstrap', array($this, 'onBootstrap'), 1000);
+        $events->attach('Zend\Mvc\Application', MvcEvent::EVENT_BOOTSTRAP, array($this, 'onBootstrap'), 1000);
     }
 
     /**
diff --git a/src/Listener/OnBootstrapListener.php b/src/Listener/OnBootstrapListener.php
index 4e96b33..8640cf3 100644
--- a/src/Listener/OnBootstrapListener.php
+++ b/src/Listener/OnBootstrapListener.php
@@ -12,6 +12,7 @@
 
 use Zend\ModuleManager\Feature\BootstrapListenerInterface;
 use Zend\ModuleManager\ModuleEvent;
+use Zend\Mvc\MvcEvent;
 
 /**
  * Autoloader listener
@@ -39,6 +40,6 @@ public function __invoke(ModuleEvent $e)
         $moduleManager = $e->getTarget();
         $events        = $moduleManager->getEventManager();
         $sharedEvents  = $events->getSharedManager();
-        $sharedEvents->attach('Zend\Mvc\Application', 'bootstrap', array($module, 'onBootstrap'));
+        $sharedEvents->attach('Zend\Mvc\Application', MvcEvent::EVENT_BOOTSTRAP, array($module, 'onBootstrap'));
     }
 }
diff --git a/test/TestAsset/MockApplication.php b/test/TestAsset/MockApplication.php
index 3f6ebc5..14da1ac 100644
--- a/test/TestAsset/MockApplication.php
+++ b/test/TestAsset/MockApplication.php
@@ -82,6 +82,6 @@ public function bootstrap()
         $event = new MvcEvent();
         $event->setApplication($this);
         $event->setTarget($this);
-        $this->getEventManager()->trigger('bootstrap', $event);
+        $this->getEventManager()->trigger(MvcEvent::EVENT_BOOTSTRAP, $event);
     }
 }