diff --git a/core/composer.json b/core/composer.json
index 3e964e4..34f486a 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -32,10 +32,10 @@
     "zendframework/zend-diactoros": "~1.1"
   },
   "require-dev": {
-    "phpunit/phpunit": "4.8.*",
-    "mikey179/vfsStream": "~1.2",
     "behat/mink": "~1.6",
-    "behat/mink-goutte-driver": "dev-master#cc5ce119b5a8e06662f634b35967aff0b0c7dfdd"
+    "behat/mink-goutte-driver": "dev-master#cc5ce119b5a8e06662f634b35967aff0b0c7dfdd",
+    "mikey179/vfsStream": "~1.2",
+    "phpunit/phpunit": "4.8.*"
   },
   "replace": {
     "drupal/action": "self.version",
diff --git a/core/composer.lock b/core/composer.lock
index 98b4280..09e7435 100644
--- a/core/composer.lock
+++ b/core/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "eb45215859dc7059359e148a382d834f",
+    "hash": "4dbe9185fa46fe7ab04c87134b3dcb9b",
     "packages": [
         {
             "name": "doctrine/annotations",