diff --git a/.gitignore b/.gitignore
index 3d4094e..45bf7bf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -14,7 +14,6 @@ Thumbs.db
 
 # composer vendor dir
 /vendor
-composer.lock
 
 # composer itself is not needed
 composer.phar
diff --git a/.scrutinizer.yml b/.scrutinizer.yml
index 5d266a9..45d7eb6 100644
--- a/.scrutinizer.yml
+++ b/.scrutinizer.yml
@@ -1,17 +1,17 @@
 imports:
-    - php
+  - php
 checks:
-    php:
-        code_rating: true
-        duplication: true
+  php:
+    code_rating: true
+    duplication: true
 tools:
-    external_code_coverage:
-        timeout: 600 # Timeout in seconds.
-    php_sim: false
-    php_cpd: false
-    php_pdepend: true
-    php_analyzer: true
-    php_changetracking: true
+  external_code_coverage:
+    timeout: 600 # Timeout in seconds.
+  php_sim: false
+  php_cpd: false
+  php_pdepend: true
+  php_analyzer: true
+  php_changetracking: true
 filter:
-    excluded_paths:
-        - vendor/*
+  excluded_paths:
+    - vendor/*
diff --git a/composer.json b/composer.json
index 512ca6f..b8503af 100644
--- a/composer.json
+++ b/composer.json
@@ -1,40 +1,49 @@
 {
-    "name": "leandrogehlen/yii2-querybuilder",
-    "description": "Extension for Yii2 Framework to work with jQuery QueryBuilder",
-    "keywords": ["yii2", "dynamic", "query", "builder", "querybuilder", "interface"],
-    "type": "yii2-extension",
-    "license": "BSD-3-Clause",
-    "prefer-stable": true,
-    "support": {
-        "issues": "https://github.com/leandrogehlen/yii2-querybuilder/issues",
-        "source": "https://github.com/leandrogehlen/yii2-querybuilder"
-    },
-    "authors": [
-        {
-            "name": "Leandro Guindani Gehlen",
-            "email": "leandrogehlen@gmail.com"
-        }
-    ],
-    "repositories": [
-        {
-            "type": "composer",
-            "url": "https://asset-packagist.org"
-        }
-    ],
-    "require": {
-        "yiisoft/yii2": "~2.0.0",
-        "solutosoft/yii2-plugin": "~1.0.0",
-        "bower-asset/jquery-querybuilder": "~2.4.0"
-    },
-    "require-dev": {
-        "phpunit/phpunit": "~4.4"
-    },
-    "autoload": {
-        "psr-4": { "leandrogehlen\\querybuilder\\": "" }
-    },
-    "extra": {
-        "branch-alias": {
-            "dev-master": "1.0.x-dev"
-        }
+  "name": "leandrogehlen/yii2-querybuilder",
+  "description": "Extension for Yii2 Framework to work with jQuery QueryBuilder",
+  "keywords": [
+    "yii2",
+    "dynamic",
+    "query",
+    "builder",
+    "querybuilder",
+    "interface"
+  ],
+  "type": "yii2-extension",
+  "license": "BSD-3-Clause",
+  "prefer-stable": true,
+  "support": {
+    "issues": "https://github.com/leandrogehlen/yii2-querybuilder/issues",
+    "source": "https://github.com/leandrogehlen/yii2-querybuilder"
+  },
+  "authors": [
+    {
+      "name": "Leandro Guindani Gehlen",
+      "email": "leandrogehlen@gmail.com"
+    }
+  ],
+  "repositories": [
+    {
+      "type": "composer",
+      "url": "https://asset-packagist.org"
+    }
+  ],
+  "require": {
+    "yiisoft/yii2": "~2.0.0",
+    "solutosoft/yii2-plugin": "~1.0.0",
+    "bower-asset/jquery-querybuilder": "~2.4.0"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "4.8.34"
+  },
+  "autoload": {
+    "psr-4": {
+      "leandrogehlen\\querybuilder\\": "src"
+    }
+  },
+  "extra": {
+    "branch-alias": {
+      "dev-master": "1.0.x-dev"
+    }
   }
 }
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..afcc098
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,1873 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "2246a0c71b8cae8d33316a5b7238fa9c",
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+            },
+            "require": {
+                "bower-asset/jquery": ">=1.9.1,<4.0"
+            },
+            "type": "bower-asset",
+            "license": [
+                "MIT"
+            ]
+        },
+        {
+            "name": "bower-asset/dot",
+            "version": "v1.1.3",
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+            "license": [
+                "MIT"
+            ]
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+            "name": "cebe/markdown",
+            "version": "1.2.1",
+            "source": {
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+                "url": "https://github.com/cebe/markdown.git",
+                "reference": "9bac5e971dd391e2802dca5400bbeacbaea9eb86"
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+                "cebe/indent": "*",
+                "facebook/xhprof": "*@dev",
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+            "bin": [
+                "bin/markdown"
+            ],
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.2.x-dev"
+                }
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+            "autoload": {
+                "psr-4": {
+                    "cebe\\markdown\\": ""
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+            "license": [
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+                    "name": "Carsten Brandt",
+                    "email": "mail@cebe.cc",
+                    "homepage": "http://cebe.cc/",
+                    "role": "Creator"
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+            "description": "A super fast, highly extensible markdown parser for PHP",
+            "homepage": "https://github.com/cebe/markdown#readme",
+            "keywords": [
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+            "type": "library",
+            "autoload": {
+                "psr-0": {
+                    "HTMLPurifier": "library/"
+                },
+                "files": [
+                    "library/HTMLPurifier.composer.php"
+                ],
+                "exclude-from-classmap": [
+                    "/library/HTMLPurifier/Language/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "LGPL-2.1-or-later"
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+            "authors": [
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+                    "name": "Edward Z. Yang",
+                    "email": "admin@htmlpurifier.org",
+                    "homepage": "http://ezyang.com"
+                }
+            ],
+            "description": "Standards compliant HTML filter written in PHP",
+            "homepage": "http://htmlpurifier.org/",
+            "keywords": [
+                "html"
+            ],
+            "support": {
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+                "source": "https://github.com/ezyang/htmlpurifier/tree/master"
+            },
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+                "reference": "b621fa645798a2017c90595f89376fdf5d1c843b",
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+            "extra": {
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+            "license": [
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+            ],
+            "authors": [
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+                    "name": "Leandro Guindani Gehlen",
+                    "email": "leandrogehlen@gmail.com"
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+            "description": "Yii 2 core code to write extensions based on javascript plugins",
+            "keywords": [
+                "core",
+                "plugin",
+                "widget",
+                "yii",
+                "yii2"
+            ],
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+                "source": "https://github.com/solutosoft/yii2-plugin"
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+            "version": "2.0.42.1",
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+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Yaml Component",
+            "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/yaml/tree/v3.4.47"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2020-10-24T10:57:07+00:00"
+        },
+        {
+            "name": "webmozart/assert",
+            "version": "1.10.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozarts/assert.git",
+                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozarts/assert/zipball/6964c76c7804814a842473e0c8fd15bab0f18e25",
+                "reference": "6964c76c7804814a842473e0c8fd15bab0f18e25",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.2 || ^8.0",
+                "symfony/polyfill-ctype": "^1.8"
+            },
+            "conflict": {
+                "phpstan/phpstan": "<0.12.20",
+                "vimeo/psalm": "<4.6.1 || 4.6.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^8.5.13"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.10-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "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"
+            ],
+            "support": {
+                "issues": "https://github.com/webmozarts/assert/issues",
+                "source": "https://github.com/webmozarts/assert/tree/1.10.0"
+            },
+            "time": "2021-03-09T10:59:23+00:00"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": true,
+    "prefer-lowest": false,
+    "platform": [],
+    "platform-dev": [],
+    "plugin-api-version": "2.0.0"
+}
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index e3511d9..2e970a4 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<phpunit bootstrap="./tests/unit/bootstrap.php"
+<phpunit bootstrap="tests/bootstrap.php"
 		colors="true"
 		convertErrorsToExceptions="true"
 		convertNoticesToExceptions="true"
@@ -7,7 +7,7 @@
 		stopOnFailure="false">
 		<testsuites>
 			<testsuite name="QueryBilder Test Suite">
-				<directory>./tests/unit</directory>
+				<directory>./tests</directory>
 			</testsuite>
 		</testsuites>
 </phpunit>
diff --git a/BootstrapAsset.php b/src/BootstrapAsset.php
similarity index 100%
rename from BootstrapAsset.php
rename to src/BootstrapAsset.php
diff --git a/QueryBuilder.php b/src/QueryBuilder.php
similarity index 100%
rename from QueryBuilder.php
rename to src/QueryBuilder.php
diff --git a/QueryBuilderAsset.php b/src/QueryBuilderAsset.php
similarity index 100%
rename from QueryBuilderAsset.php
rename to src/QueryBuilderAsset.php
diff --git a/QueryBuilderForm.php b/src/QueryBuilderForm.php
similarity index 100%
rename from QueryBuilderForm.php
rename to src/QueryBuilderForm.php
diff --git a/Translator.php b/src/Translator.php
similarity index 100%
rename from Translator.php
rename to src/Translator.php
diff --git a/Validation.php b/src/Validation.php
similarity index 100%
rename from Validation.php
rename to src/Validation.php
diff --git a/tests/unit/TestCase.php b/tests/TestCase.php
similarity index 96%
rename from tests/unit/TestCase.php
rename to tests/TestCase.php
index 4effc99..ab50014 100644
--- a/tests/unit/TestCase.php
+++ b/tests/TestCase.php
@@ -17,7 +17,7 @@ class TestCase extends \PHPUnit_Framework_TestCase
      */
     public static function setUpBeforeClass()
     {
-        $vendorDir = __DIR__ . '/../../vendor';
+        $vendorDir = __DIR__ . '/../vendor';
         $vendorAutoload = $vendorDir . '/autoload.php';
         if (file_exists($vendorAutoload)) {
             require_once($vendorAutoload);
diff --git a/tests/unit/TranslatorTest.php b/tests/TranslatorTest.php
similarity index 100%
rename from tests/unit/TranslatorTest.php
rename to tests/TranslatorTest.php
diff --git a/tests/unit/bootstrap.php b/tests/bootstrap.php
similarity index 91%
rename from tests/unit/bootstrap.php
rename to tests/bootstrap.php
index 7768e50..13b5fa8 100644
--- a/tests/unit/bootstrap.php
+++ b/tests/bootstrap.php
@@ -9,7 +9,7 @@
 $_SERVER['SCRIPT_FILENAME'] = __FILE__;
 
 // require composer autoloader if available
-$vendor = __DIR__ . '/../../vendor';
+$vendor = __DIR__ . '/../vendor';
 
 require_once($vendor . '/autoload.php');
 require_once($vendor . '/yiisoft/yii2/Yii.php');