diff --git a/composer.json b/composer.json
index 2ca6863..8d00f8b 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
     },
     "require-dev": {
         "malukenho/docheader": "^0.1.6",
-        "mikey179/vfsStream": "^1.6.5",
+        "mikey179/vfsstream": "^1.6.7",
         "mockery/mockery": "^1.0",
         "php-mock/php-mock-phpunit": "^2.1",
         "phpunit/phpunit": "^7.0.3",
diff --git a/composer.lock b/composer.lock
index ce68349..99c6627 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "f22771b313db38a619c622f32454f8ae",
+    "content-hash": "6f6705668142d928a3fe8ca0962a697c",
     "packages": [
         {
             "name": "fig/http-message-util",
@@ -1274,24 +1274,24 @@
             "time": "2017-12-18T09:16:11+00:00"
         },
         {
-            "name": "mikey179/vfsStream",
-            "version": "v1.6.5",
+            "name": "mikey179/vfsstream",
+            "version": "v1.6.7",
             "source": {
                 "type": "git",
-                "url": "https://github.com/mikey179/vfsStream.git",
-                "reference": "d5fec95f541d4d71c4823bb5e30cf9b9e5b96145"
+                "url": "https://github.com/bovigo/vfsStream.git",
+                "reference": "2b544ac3a21bcc4dde5d90c4ae8d06f4319055fb"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/mikey179/vfsStream/zipball/d5fec95f541d4d71c4823bb5e30cf9b9e5b96145",
-                "reference": "d5fec95f541d4d71c4823bb5e30cf9b9e5b96145",
+                "url": "https://api.github.com/repos/bovigo/vfsStream/zipball/2b544ac3a21bcc4dde5d90c4ae8d06f4319055fb",
+                "reference": "2b544ac3a21bcc4dde5d90c4ae8d06f4319055fb",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.5"
+                "phpunit/phpunit": "^4.5|^5.0"
             },
             "type": "library",
             "extra": {
@@ -1311,13 +1311,13 @@
             "authors": [
                 {
                     "name": "Frank Kleine",
-                    "homepage": "http://frankkleine.de/",
-                    "role": "Developer"
+                    "role": "Developer",
+                    "homepage": "http://frankkleine.de/"
                 }
             ],
             "description": "Virtual file system to mock the real file system in unit tests.",
             "homepage": "http://vfs.bovigo.org/",
-            "time": "2017-08-01T08:02:14+00:00"
+            "time": "2019-08-01T01:38:37+00:00"
         },
         {
             "name": "mockery/mockery",