diff --git a/.travis.yml b/.travis.yml
index 381608e534..38291566eb 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,10 +32,12 @@ before_script:
   - sudo apt-get update -qq
   - sudo apt-get install -y myrepos
   - mr --trust-all --stats up
+  # installing phpunit in version suitable for used PHP version
+  - composer.phar update phpunit/phpunit
 
 script:
-  ./doc/php_syntax_check.sh
-  ./doc/test-cli.php
+  - ./doc/php_syntax_check.sh
+  - ./doc/test-cli.php
 
 cache:
   directories:
diff --git a/composer.json b/composer.json
index efa392a384..534e81f0d0 100644
--- a/composer.json
+++ b/composer.json
@@ -35,6 +35,6 @@
 		"npm-asset/gridster":"0.5.*"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "5.4.*"
+		"phpunit/phpunit": "~4.8|~5.4"
 	}
 }
diff --git a/composer.lock b/composer.lock
index 041747a51a..d75bb141bf 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,8 +4,8 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "hash": "978d508db5aa952f99311aa2e959e51c",
-    "content-hash": "c23ecb89ed77d0502a9fcab03f91189b",
+    "hash": "161dd6c4337c9045e752743d66e4dbe2",
+    "content-hash": "5b29daae29d01f2d83431519723683a1",
     "packages": [
         {
             "name": "bower-asset/fastclick",
@@ -1325,1304 +1325,7 @@
             "description": "Selection of methods that are often needed when working with XML documents.  Functionality includes creating of attribute lists from arrays, creation of tags, validation of XML names and more."
         }
     ],
-    "packages-dev": [
-        {
-            "name": "doctrine/instantiator",
-            "version": "1.0.5",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/8e884e78f9f0eb1329e445619e04456e64d8051d",
-                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=5.3,<8.0-DEV"
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-            "require-dev": {
-                "athletic/athletic": "~0.1.8",
-                "ext-pdo": "*",
-                "ext-phar": "*",
-                "phpunit/phpunit": "~4.0",
-                "squizlabs/php_codesniffer": "~2.0"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.0.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Doctrine\\Instantiator\\": "src/Doctrine/Instantiator/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Marco Pivetta",
-                    "email": "ocramius@gmail.com",
-                    "homepage": "http://ocramius.github.com/"
-                }
-            ],
-            "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
-            "homepage": "https://github.com/doctrine/instantiator",
-            "keywords": [
-                "constructor",
-                "instantiate"
-            ],
-            "time": "2015-06-14 21:17:01"
-        },
-        {
-            "name": "myclabs/deep-copy",
-            "version": "1.5.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/myclabs/DeepCopy.git",
-                "reference": "a8773992b362b58498eed24bf85005f363c34771"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/a8773992b362b58498eed24bf85005f363c34771",
-                "reference": "a8773992b362b58498eed24bf85005f363c34771",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=5.4.0"
-            },
-            "require-dev": {
-                "doctrine/collections": "1.*",
-                "phpunit/phpunit": "~4.1"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
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-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "description": "Create deep copies (clones) of your objects",
-            "homepage": "https://github.com/myclabs/DeepCopy",
-            "keywords": [
-                "clone",
-                "copy",
-                "duplicate",
-                "object",
-                "object graph"
-            ],
-            "time": "2015-11-20 12:04:31"
-        },
-        {
-            "name": "phpdocumentor/reflection-common",
-            "version": "1.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/phpDocumentor/ReflectionCommon.git",
-                "reference": "144c307535e82c8fdcaacbcfc1d6d8eeb896687c"
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-            },
-            "require-dev": {
-                "phpunit/phpunit": "^4.6"
-            },
-            "type": "library",
-            "extra": {
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-                }
-            },
-            "autoload": {
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-                    "phpDocumentor\\Reflection\\": [
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-            "license": [
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-            "authors": [
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-                    "name": "Jaap van Otterdijk",
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-            "description": "Common reflection classes used by phpdocumentor to reflect the code structure",
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-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Bernhard Schussek",
-                    "email": "bschussek@gmail.com"
-                }
-            ],
-            "description": "Assertions to validate method input/output with nice error messages.",
-            "keywords": [
-                "assert",
-                "check",
-                "validate"
-            ],
-            "time": "2015-08-24 13:29:44"
-        }
-    ],
+    "packages-dev": [],
     "aliases": [],
     "minimum-stability": "stable",
     "stability-flags": {