diff --git a/.travis.yml b/.travis.yml
index 8deeddd..e6928c1 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,10 +1,7 @@
 language: php
-
 php:
-  - 5.4
-  - 5.5
-  - 5.6
-  - 7.0
+  - 7.1
+  - 7.2
 
 # faster builds on new travis setup not using sudo
 sudo: false
@@ -17,10 +14,9 @@ cache:
 
 install:
   - travis_retry composer self-update && composer --version
-  - travis_retry composer global require "fxp/composer-asset-plugin:~1.1.1"
   - export PATH="$HOME/.composer/vendor/bin:$PATH"
   - travis_retry composer install --prefer-dist --no-interaction
 
 script:
   - vendor/friendsofphp/php-cs-fixer/php-cs-fixer fix --dry-run --diff
-  - phpunit --verbose $PHPUNIT_FLAGS
+  - vendor/bin/phpunit --verbose
diff --git a/PurifyBehavior.php b/PurifyBehavior.php
index 549745b..f9729f8 100644
--- a/PurifyBehavior.php
+++ b/PurifyBehavior.php
@@ -6,11 +6,6 @@
 use yii\db\ActiveRecord;
 use yii\helpers\HtmlPurifier;
 
-/**
- * Class PurifyBehavior
- *
- * @package yii2mod\behaviors
- */
 class PurifyBehavior extends Behavior
 {
     /**
@@ -21,7 +16,7 @@ class PurifyBehavior extends Behavior
     /**
      * @var null The config to use for HtmlPurifier
      */
-    public $config = null;
+    public $config;
 
     /**
      * Declares event handlers for the [[owner]]'s events.
diff --git a/composer.json b/composer.json
index 62a54e3..aa46f18 100644
--- a/composer.json
+++ b/composer.json
@@ -14,19 +14,35 @@
         },
         {
             "name": "Igor Chepurnoy",
-            "email": "igorzfort@gmail.com"
+            "email": "chepurnoi.igor@gmail.com"
         }
     ],
     "require": {
-        "yiisoft/yii2": ">=2.0.5",
+        "php": "^7.1.8",
+        "yiisoft/yii2": "~2.0.10",
         "nesbot/carbon": "^2.16"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "~2.0"
+        "friendsofphp/php-cs-fixer": "~2.0",
+        "phpunit/phpunit": "^7.3"
     },
     "autoload": {
         "psr-4": {
             "yii2mod\\behaviors\\": ""
         }
-    }
+    },
+    "scripts": {
+        "phpcs": "php-cs-fixer fix -v --diff --dry-run --allow-risky=yes;",
+        "phpunit": "phpunit --coverage-text",
+        "test": [
+            "@phpunit",
+            "@phpcs"
+        ]
+    },
+    "repositories": [
+        {
+            "type": "composer",
+            "url": "https://asset-packagist.org"
+        }
+    ]
 }
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index e7a74b9..81482a0 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,13 +1,13 @@
 <?xml version="1.0" encoding="utf-8"?>
 <phpunit bootstrap="./tests/bootstrap.php"
-		colors="true"
-		convertErrorsToExceptions="true"
-		convertNoticesToExceptions="true"
-		convertWarningsToExceptions="true"
-		stopOnFailure="false">
-		<testsuites>
-			<testsuite name="Yii2mod Test Suite">
-				<directory>./tests</directory>
-			</testsuite>
-		</testsuites>
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         stopOnFailure="false">
+    <testsuites>
+        <testsuite name="Yii2mod Test Suite">
+            <directory>./tests</directory>
+        </testsuite>
+    </testsuites>
 </phpunit>
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 569a364..39d3c97 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -9,11 +9,12 @@
 /**
  * This is the base class for all yii framework unit tests.
  */
-class TestCase extends \PHPUnit_Framework_TestCase
+class TestCase extends \PHPUnit\Framework\TestCase
 {
     protected function setUp()
     {
         parent::setUp();
+
         $this->mockApplication();
 
         $this->createRuntimeFolder();
diff --git a/tests/data/PostModel.php b/tests/data/PostModel.php
index debffa0..0562793 100644
--- a/tests/data/PostModel.php
+++ b/tests/data/PostModel.php
@@ -38,13 +38,13 @@ public function behaviors()
     {
         return [
             'carbon' => [
-                'class' => CarbonBehavior::className(),
+                'class' => CarbonBehavior::class,
                 'attributes' => [
                     'createdAt',
                 ],
             ],
             'purify' => [
-                'class' => PurifyBehavior::className(),
+                'class' => PurifyBehavior::class,
                 'attributes' => ['title'],
                 'config' => [
                     'AutoFormat.Linkify' => true,