diff --git a/.scrutinizer.yml b/.scrutinizer.yml
index fd8c88df..ac639b92 100644
--- a/.scrutinizer.yml
+++ b/.scrutinizer.yml
@@ -1,7 +1,7 @@
 build:
     environment:
         variables:
-            COMPOSER_ROOT_VERSION: '0.9.99'
+            COMPOSER_ROOT_VERSION: '0.10.99'
 
     tests:
         override:
diff --git a/.travis.yml b/.travis.yml
index 783ea147..9c2f5077 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,7 +19,7 @@ matrix:
 before_install:
   - echo "memory_limit=-1" >> ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/travis.ini
   - phpenv config-rm xdebug.ini || true
-  - export COMPOSER_ROOT_VERSION=0.9.99
+  - export COMPOSER_ROOT_VERSION=0.10.99
   - |
     if [ 'false' == "$TRAVIS_PULL_REQUEST" ]; then
       cp box.json.dist box.json
diff --git a/Makefile b/Makefile
index 60a2a998..c82fa6e4 100644
--- a/Makefile
+++ b/Makefile
@@ -55,7 +55,7 @@ PHPSCOPER=bin/php-scoper.phar
 .PHONY: e2e_004
 e2e_004:	## Run end-to-end tests for the fixture set 004 — Source code case
 e2e_004: bin/php-scoper.phar
-	$(PHPBIN) $(BOX) compile --working-dir fixtures/set004
+	$(PHPBIN) $(BOX) compile --no-parallel --working-dir fixtures/set004
 
 	php build/set004/bin/greet.phar > build/set004/output
 	diff fixtures/set004/expected-output build/set004/output
@@ -63,7 +63,7 @@ e2e_004: bin/php-scoper.phar
 .PHONY: e2e_005
 e2e_005:	## Run end-to-end tests for the fixture set 005 — Third-party code case
 e2e_005: bin/php-scoper.phar fixtures/set005/vendor
-	$(PHPBIN) $(BOX) compile --working-dir fixtures/set005
+	$(PHPBIN) $(BOX) compile --no-parallel --working-dir fixtures/set005
 
 	php build/set005/bin/greet.phar > build/set005/output
 	diff fixtures/set005/expected-output build/set005/output
@@ -71,7 +71,7 @@ e2e_005: bin/php-scoper.phar fixtures/set005/vendor
 .PHONY: e2e_011
 e2e_011:	## Run end-to-end tests for the fixture set 011 — Whitelist case
 e2e_011: bin/php-scoper.phar fixtures/set011/vendor
-	$(PHPBIN) $(BOX) compile --working-dir fixtures/set011
+	$(PHPBIN) $(BOX) compile --no-parallel --working-dir fixtures/set011
 	cp -R fixtures/set011/tests/ build/set011/tests/
 
 	php build/set011/bin/greet.phar > build/set011/output
@@ -88,7 +88,7 @@ e2e_013: bin/php-scoper.phar
 .PHONY: e2e_014
 e2e_014:	## Run end-to-end tests for the fixture set 014 — Source code case with PSR-0
 e2e_014: bin/php-scoper.phar
-	$(PHPBIN) $(BOX) compile --working-dir fixtures/set014
+	$(PHPBIN) $(BOX) compile --no-parallel --working-dir fixtures/set014
 
 	php build/set014/bin/greet.phar > build/set014/output
 	diff fixtures/set014/expected-output build/set014/output
@@ -96,7 +96,7 @@ e2e_014: bin/php-scoper.phar
 .PHONY: e2e_015
 e2e_015:	## Run end-to-end tests for the fixture set 015 — Third-party code case with PSR-0
 e2e_015: bin/php-scoper.phar fixtures/set015/vendor
-	$(PHPBIN) $(BOX) compile --working-dir fixtures/set015
+	$(PHPBIN) $(BOX) compile --no-parallel --working-dir fixtures/set015
 
 	php build/set015/bin/greet.phar > build/set015/output
 	diff fixtures/set015/expected-output build/set015/output
@@ -203,7 +203,7 @@ e2e_021: bin/php-scoper.phar fixtures/set021-composer/vendor
 .PHONY: e2e_022
 e2e_022:	## Run end-to-end tests for the fixture set 022 — Whitelist the project code with namespace whitelisting
 e2e_022: bin/php-scoper.phar fixtures/set022/vendor
-	$(PHPBIN) $(BOX) compile --working-dir fixtures/set022
+	$(PHPBIN) $(BOX) compile --no-parallel --working-dir fixtures/set022
 	cp -R fixtures/set022/tests/ build/set022/tests/
 
 	php build/set022/bin/greet.phar > build/set022/output
@@ -294,17 +294,17 @@ tb: bin/php-scoper.phar  vendor
 #---------------------------------------------------------------------------
 
 vendor: composer.lock
-	export COMPOSER_ROOT_VERSION='0.9.99'; composer install
+	export COMPOSER_ROOT_VERSION='0.10.99'; composer install
 	unset "COMPOSER_ROOT_VERSION"
 	touch $@
 
 vendor/bamarni: composer.lock
-	export COMPOSER_ROOT_VERSION='0.9.99'; composer install
+	export COMPOSER_ROOT_VERSION='0.10.99'; composer install
 	unset "COMPOSER_ROOT_VERSION"
 	touch $@
 
 bin/phpunit: composer.lock
-	export COMPOSER_ROOT_VERSION='0.9.99'; composer install
+	export COMPOSER_ROOT_VERSION='0.10.99'; composer install
 	unset "COMPOSER_ROOT_VERSION"
 	touch $@
 
@@ -316,7 +316,7 @@ fixtures/set005/vendor: fixtures/set005/composer.lock
 	composer --working-dir=fixtures/set005 install
 	touch $@
 
-fixtures/set011/vendor: fixtures/set011/vendor
+fixtures/set011/vendor:
 	composer --working-dir=fixtures/set011 dump-autoload
 	touch $@
 
diff --git a/box.json.dist b/box.json.dist
index 5e3e2b8c..ec64a21e 100644
--- a/box.json.dist
+++ b/box.json.dist
@@ -1,6 +1,4 @@
 {
-    "chmod": "0755",
-
     "algorithm": "OPENSSL",
     "key": ".travis/php-scoper-private.pem",
 
diff --git a/composer.json b/composer.json
index 3f6f6c25..35e5e4b5 100644
--- a/composer.json
+++ b/composer.json
@@ -17,6 +17,8 @@
         }
     ],
 
+    "minimum-stability": "dev",
+    "prefer-stable": true,
     "require": {
         "php": "^7.1",
         "nikic/php-parser": "^4.0",
@@ -28,7 +30,7 @@
     },
     "require-dev": {
         "bamarni/composer-bin-plugin": "^1.1",
-        "humbug/box": "^3.0@rc",
+        "humbug/box": "^3.1",
         "phpunit/phpunit": "^7.0"
     },
     "replace": {
diff --git a/composer.lock b/composer.lock
index ea9ac5e3..3cb26bf2 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,20 +4,20 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "9461985caf0ad2224dd54d8469692771",
+    "content-hash": "9278b515a6fc05661c99c5186ad94f07",
     "packages": [
         {
             "name": "nikic/php-parser",
-            "version": "v4.0.3",
+            "version": "v4.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/nikic/PHP-Parser.git",
-                "reference": "bd088dc940a418f09cda079a9b5c7c478890fb8d"
+                "reference": "d0230c5c77a7e3cfa69446febf340978540958c0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/bd088dc940a418f09cda079a9b5c7c478890fb8d",
-                "reference": "bd088dc940a418f09cda079a9b5c7c478890fb8d",
+                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/d0230c5c77a7e3cfa69446febf340978540958c0",
+                "reference": "d0230c5c77a7e3cfa69446febf340978540958c0",
                 "shasum": ""
             },
             "require": {
@@ -33,7 +33,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0-dev"
+                    "dev-master": "4.1-dev"
                 }
             },
             "autoload": {
@@ -55,7 +55,7 @@
                 "parser",
                 "php"
             ],
-            "time": "2018-07-15T17:25:16+00:00"
+            "time": "2018-10-10T09:24:14+00:00"
         },
         {
             "name": "ocramius/package-versions",
@@ -407,16 +407,16 @@
         },
         {
             "name": "symfony/console",
-            "version": "v3.4.14",
+            "version": "v3.4.17",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "6b217594552b9323bcdcfc14f8a0ce126e84cd73"
+                "reference": "3b2b415d4c48fbefca7dc742aa0a0171bfae4e0b"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/6b217594552b9323bcdcfc14f8a0ce126e84cd73",
-                "reference": "6b217594552b9323bcdcfc14f8a0ce126e84cd73",
+                "url": "https://api.github.com/repos/symfony/console/zipball/3b2b415d4c48fbefca7dc742aa0a0171bfae4e0b",
+                "reference": "3b2b415d4c48fbefca7dc742aa0a0171bfae4e0b",
                 "shasum": ""
             },
             "require": {
@@ -472,20 +472,20 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-02T16:33:53+00:00"
         },
         {
             "name": "symfony/debug",
-            "version": "v3.4.14",
+            "version": "v3.4.17",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/debug.git",
-                "reference": "d5a058ff6ecad26b30c1ba452241306ea34c65cc"
+                "reference": "0a612e9dfbd2ccce03eb174365f31ecdca930ff6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/debug/zipball/d5a058ff6ecad26b30c1ba452241306ea34c65cc",
-                "reference": "d5a058ff6ecad26b30c1ba452241306ea34c65cc",
+                "url": "https://api.github.com/repos/symfony/debug/zipball/0a612e9dfbd2ccce03eb174365f31ecdca930ff6",
+                "reference": "0a612e9dfbd2ccce03eb174365f31ecdca930ff6",
                 "shasum": ""
             },
             "require": {
@@ -528,20 +528,20 @@
             ],
             "description": "Symfony Debug Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-02T16:33:53+00:00"
         },
         {
             "name": "symfony/filesystem",
-            "version": "v3.4.14",
+            "version": "v3.4.17",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/filesystem.git",
-                "reference": "a59f917e3c5d82332514cb4538387638f5bde2d6"
+                "reference": "d69930fc337d767607267d57c20a7403d0a822a4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/a59f917e3c5d82332514cb4538387638f5bde2d6",
-                "reference": "a59f917e3c5d82332514cb4538387638f5bde2d6",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/d69930fc337d767607267d57c20a7403d0a822a4",
+                "reference": "d69930fc337d767607267d57c20a7403d0a822a4",
                 "shasum": ""
             },
             "require": {
@@ -578,20 +578,20 @@
             ],
             "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-02T12:28:39+00:00"
         },
         {
             "name": "symfony/finder",
-            "version": "v3.4.14",
+            "version": "v3.4.17",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/finder.git",
-                "reference": "8a84fcb207451df0013b2c74cbbf1b62d47b999a"
+                "reference": "54ba444dddc5bd5708a34bd095ea67c6eb54644d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/finder/zipball/8a84fcb207451df0013b2c74cbbf1b62d47b999a",
-                "reference": "8a84fcb207451df0013b2c74cbbf1b62d47b999a",
+                "url": "https://api.github.com/repos/symfony/finder/zipball/54ba444dddc5bd5708a34bd095ea67c6eb54644d",
+                "reference": "54ba444dddc5bd5708a34bd095ea67c6eb54644d",
                 "shasum": ""
             },
             "require": {
@@ -627,7 +627,7 @@
             ],
             "description": "Symfony Finder Component",
             "homepage": "https://symfony.com",
-            "time": "2018-07-26T11:19:56+00:00"
+            "time": "2018-10-03T08:46:40+00:00"
         },
         {
             "name": "symfony/polyfill-ctype",
@@ -876,24 +876,26 @@
         },
         {
             "name": "amphp/byte-stream",
-            "version": "v1.3.1",
+            "version": "v1.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/amphp/byte-stream.git",
-                "reference": "1b75b122e6f069e7d102eef065dc192119d99ca7"
+                "reference": "17fae3bcecf9b4e7854c4ee41e8d6f58dac5d98d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/amphp/byte-stream/zipball/1b75b122e6f069e7d102eef065dc192119d99ca7",
-                "reference": "1b75b122e6f069e7d102eef065dc192119d99ca7",
+                "url": "https://api.github.com/repos/amphp/byte-stream/zipball/17fae3bcecf9b4e7854c4ee41e8d6f58dac5d98d",
+                "reference": "17fae3bcecf9b4e7854c4ee41e8d6f58dac5d98d",
                 "shasum": ""
             },
             "require": {
                 "amphp/amp": "^2"
             },
             "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
                 "amphp/phpunit-util": "^1",
                 "friendsofphp/php-cs-fixer": "^2.3",
+                "infection/infection": "^0.9.3",
                 "phpunit/phpunit": "^6"
             },
             "type": "library",
@@ -929,7 +931,7 @@
                 "non-blocking",
                 "stream"
             ],
-            "time": "2018-04-04T05:33:09+00:00"
+            "time": "2018-10-03T15:37:23+00:00"
         },
         {
             "name": "amphp/parallel",
@@ -1300,16 +1302,16 @@
         },
         {
             "name": "composer/ca-bundle",
-            "version": "1.1.1",
+            "version": "1.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/ca-bundle.git",
-                "reference": "d2c0a83b7533d6912e8d516756ebd34f893e9169"
+                "reference": "46afded9720f40b9dc63542af4e3e43a1177acb0"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/d2c0a83b7533d6912e8d516756ebd34f893e9169",
-                "reference": "d2c0a83b7533d6912e8d516756ebd34f893e9169",
+                "url": "https://api.github.com/repos/composer/ca-bundle/zipball/46afded9720f40b9dc63542af4e3e43a1177acb0",
+                "reference": "46afded9720f40b9dc63542af4e3e43a1177acb0",
                 "shasum": ""
             },
             "require": {
@@ -1352,20 +1354,20 @@
                 "ssl",
                 "tls"
             ],
-            "time": "2018-03-29T19:57:20+00:00"
+            "time": "2018-08-08T08:57:40+00:00"
         },
         {
             "name": "composer/composer",
-            "version": "1.7.0",
+            "version": "1.7.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/composer.git",
-                "reference": "39edb2f375679a4eba19e69e9c9491e302976983"
+                "reference": "576aab9b5abb2ed11a1c52353a759363216a4ad2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/composer/zipball/39edb2f375679a4eba19e69e9c9491e302976983",
-                "reference": "39edb2f375679a4eba19e69e9c9491e302976983",
+                "url": "https://api.github.com/repos/composer/composer/zipball/576aab9b5abb2ed11a1c52353a759363216a4ad2",
+                "reference": "576aab9b5abb2ed11a1c52353a759363216a4ad2",
                 "shasum": ""
             },
             "require": {
@@ -1432,7 +1434,7 @@
                 "dependency",
                 "package"
             ],
-            "time": "2018-08-03T13:39:07+00:00"
+            "time": "2018-08-16T14:57:12+00:00"
         },
         {
             "name": "composer/semver",
@@ -1559,16 +1561,16 @@
         },
         {
             "name": "composer/xdebug-handler",
-            "version": "1.1.0",
+            "version": "1.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/composer/xdebug-handler.git",
-                "reference": "c919dc6c62e221fc6406f861ea13433c0aa24f08"
+                "reference": "b8e9745fb9b06ea6664d8872c4505fb16df4611c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/c919dc6c62e221fc6406f861ea13433c0aa24f08",
-                "reference": "c919dc6c62e221fc6406f861ea13433c0aa24f08",
+                "url": "https://api.github.com/repos/composer/xdebug-handler/zipball/b8e9745fb9b06ea6664d8872c4505fb16df4611c",
+                "reference": "b8e9745fb9b06ea6664d8872c4505fb16df4611c",
                 "shasum": ""
             },
             "require": {
@@ -1599,7 +1601,7 @@
                 "Xdebug",
                 "performance"
             ],
-            "time": "2018-04-11T15:42:36+00:00"
+            "time": "2018-08-31T19:07:57+00:00"
         },
         {
             "name": "doctrine/annotations",
@@ -1833,16 +1835,16 @@
         },
         {
             "name": "humbug/box",
-            "version": "3.0.0-RC.0",
+            "version": "3.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/humbug/box.git",
-                "reference": "274dba37a285fc90a403445c725173fe863793b2"
+                "reference": "6dc36fdd2240b81dc65c6e33b1a82d2a63c2eb86"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/humbug/box/zipball/274dba37a285fc90a403445c725173fe863793b2",
-                "reference": "274dba37a285fc90a403445c725173fe863793b2",
+                "url": "https://api.github.com/repos/humbug/box/zipball/6dc36fdd2240b81dc65c6e33b1a82d2a63c2eb86",
+                "reference": "6dc36fdd2240b81dc65c6e33b1a82d2a63c2eb86",
                 "shasum": ""
             },
             "require": {
@@ -1852,11 +1854,11 @@
                 "composer/xdebug-handler": "^1.1.0",
                 "ext-phar": "*",
                 "herrera-io/annotations": "~1.0",
-                "humbug/php-scoper": "^0.9",
+                "humbug/php-scoper": "^0.10",
                 "justinrainbow/json-schema": "^5.2",
                 "nikic/iter": "^1.6",
                 "ocramius/package-versions": "^1.3",
-                "paragonie/pharaoh": "^0.4.0",
+                "paragonie/pharaoh": "dev-master#45f139d",
                 "php": "^7.1",
                 "phpseclib/phpseclib": "~2.0",
                 "seld/jsonlint": "^1.6",
@@ -1868,9 +1870,10 @@
             },
             "require-dev": {
                 "bamarni/composer-bin-plugin": "^1.2",
-                "infection/infection": "^0.9.2",
+                "infection/infection": "^0.10",
                 "mikey179/vfsstream": "^1.1",
-                "phpunit/phpunit": "^7.0"
+                "phpunit/phpunit": "^7.0",
+                "symfony/phpunit-bridge": "^4.1"
             },
             "suggest": {
                 "ext-openssl": "To accelerate private key generation."
@@ -1919,7 +1922,7 @@
             "keywords": [
                 "phar"
             ],
-            "time": "2018-08-06T17:17:03+00:00"
+            "time": "2018-10-09T21:20:46+00:00"
         },
         {
             "name": "justinrainbow/json-schema",
@@ -2081,20 +2084,20 @@
         },
         {
             "name": "opis/closure",
-            "version": "3.0.12",
+            "version": "3.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/opis/closure.git",
-                "reference": "507a28d15e79258d404ba76e73976ba895d0eb11"
+                "reference": "d3209e46ad6c69a969b705df0738fd0dbe26ef9e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/opis/closure/zipball/507a28d15e79258d404ba76e73976ba895d0eb11",
-                "reference": "507a28d15e79258d404ba76e73976ba895d0eb11",
+                "url": "https://api.github.com/repos/opis/closure/zipball/d3209e46ad6c69a969b705df0738fd0dbe26ef9e",
+                "reference": "d3209e46ad6c69a969b705df0738fd0dbe26ef9e",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.4.0"
+                "php": "^5.4 || ^7.0"
             },
             "require-dev": {
                 "jeremeamia/superclosure": "^2.0",
@@ -2122,10 +2125,14 @@
                 {
                     "name": "Marius Sarca",
                     "email": "marius.sarca@gmail.com"
+                },
+                {
+                    "name": "Sorin Sarca",
+                    "email": "sarca_sorin@hotmail.com"
                 }
             ],
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