diff --git a/.travis.yml b/.travis.yml
index bc11265c0c8..4ecc4d5623b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -289,7 +289,7 @@ script:
   # Ensure we catch errors
   set -e
   #parallel-lint --exclude htdocs/includes --blame .
-  parallel-lint --exclude htdocs/includes/sabre/sabre/event/tests --exclude htdocs/includes/sabre/sabre/event/examples --exclude htdocs/includes/sabre/sabre/dav/tests --exclude htdocs/includes/sabre/sabre/vobject/tests --exclude htdocs/includes/jakub-onderka/php-parallel-lint/tests --exclude htdocs/includes/mike42/escpos-php/example --exclude htdocs/includes/phpunit/php-token-stream/tests --exclude htdocs/includes/sabre/composer/autoload_static.php --exclude htdocs/includes/composer/autoload_static.php --blame .
+  parallel-lint --exclude htdocs/includes/sabre --exclude htdocs/includes/jakub-onderka/php-parallel-lint/tests --exclude htdocs/includes/mike42/escpos-php/example --exclude htdocs/includes/phpunit/php-token-stream/tests --exclude htdocs/includes/sabre/composer/autoload_static.php --exclude htdocs/includes/composer/autoload_static.php --blame .
   set +e
   echo
 
diff --git a/htdocs/includes/swiftmailer/lib/classes/Swift/Transport/Esmtp/Auth/NTLMAuthenticator.php b/htdocs/includes/swiftmailer/lib/classes/Swift/Transport/Esmtp/Auth/NTLMAuthenticator.php
index b640c1c1d1d..7b8608d4a1b 100644
--- a/htdocs/includes/swiftmailer/lib/classes/Swift/Transport/Esmtp/Auth/NTLMAuthenticator.php
+++ b/htdocs/includes/swiftmailer/lib/classes/Swift/Transport/Esmtp/Auth/NTLMAuthenticator.php
@@ -555,7 +555,7 @@ class Swift_Transport_Esmtp_Auth_NTLMAuthenticator implements Swift_Transport_Es
      *
      * @return string
      */
-    protected function getRandomBytes($length) : string
+    protected function getRandomBytes($length)
     {
         $bytes = openssl_random_pseudo_bytes($length, $strong);
         if (false !== $bytes && true === $strong) {