diff --git a/pub/errors/processor.php b/pub/errors/processor.php
--- a/pub/errors/processor.php
+++ b/pub/errors/processor.php
@@ -213,7 +213,7 @@
      */
     public function process404()
     {
-        $this->pageTitle = 'Error 404: Not Found';
+        $this->pageTitle = 'Page Not Found';
         $this->_response->setHttpResponseCode(404);
         $this->_response->setBody($this->_renderPage('404.phtml'));
         return $this->_response;
@@ -226,7 +226,7 @@
      */
     public function process503()
     {
-        $this->pageTitle = 'Error 503: Service Unavailable';
+        $this->pageTitle = 'Service Unavailable';
         $this->_response->setHttpResponseCode(503);
         $this->_response->setBody($this->_renderPage('503.phtml'));
         return $this->_response;