diff --git a/.scrutinizer.yml b/.scrutinizer.yml
index 6eeb828..9f7d41c 100644
--- a/.scrutinizer.yml
+++ b/.scrutinizer.yml
@@ -12,4 +12,4 @@ tools:
         timeout: 600
     php_code_sniffer:
         config:
-            standard: "PSR2"
+            standard: "PSR12"
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index acb81ea..f646d9c 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -44,6 +44,8 @@ Write code and tests. When you are ready, run the tests.
 $ composer test
 ```
 
+
+
 When you are ready with the code, tested it and documented it, you can commit and push it with the following commands:
 
 ``` bash
@@ -76,9 +78,14 @@ $ git push -f origin feature-or-bug-fix-description
 
 ## Coding standard
 
-This repository follows the [PSR-2 standard](http://www.php-fig.org/psr/psr-2/) and so, if you want to contribute,
+This repository follows the [PSR-12 standard](https://www.php-fig.org/psr/psr-12/) and so, if you want to contribute,
 you must follow these rules.
 
+To ensure that your code meets the coding standards, you can run the linter using the following command:
+
+```bash
+$ composer lint
+```
 
 ## Semver
 
diff --git a/composer.json b/composer.json
index f95bb2d..63c2364 100644
--- a/composer.json
+++ b/composer.json
@@ -10,7 +10,8 @@
     "type": "library",
     "license": "MIT",
     "require-dev": {
-        "phpunit/phpunit": "^4.0"
+        "phpunit/phpunit": "^4.0",
+        "squizlabs/php_codesniffer": "4.x-dev"
     },
     "autoload": {
         "psr-4": {
@@ -25,6 +26,8 @@
         ]
     },
     "scripts": {
+        "lint": "phpcs src",
+        "lint-fix": "phpcbf src",
         "test": "vendor/bin/phpunit",
         "test-ci": "vendor/bin/phpunit -c phpunit.xml.ci"
     },
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
index 0000000..811bbc7
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0"?>
+<ruleset name="PHPFunct">
+    <description>PHPFunct ruleset</description>
+
+    <!-- Include PSR12 standard -->
+    <rule ref="PSR12" />
+
+    <!-- Disable line length exceeding 120 characters -->
+    <rule ref="Generic.Files.LineLength">
+        <exclude name="Generic.Files.LineLength.TooLong" />
+    </rule>
+</ruleset>
diff --git a/src/General.php b/src/General.php
index 4b8fa1d..acc5f24 100644
--- a/src/General.php
+++ b/src/General.php
@@ -157,7 +157,7 @@ function true($value)
 
 /**
  * Returns the first param if isset or the second one or null if it doesn't
- * 
+ *
  * @param mixed $value
  * @param mixed $default
  * @return mixed
diff --git a/src/Strings.php b/src/Strings.php
index 99ff69e..0b003f2 100644
--- a/src/Strings.php
+++ b/src/Strings.php
@@ -107,7 +107,6 @@ function chompLeft($input, $prefix)
 function chompRight($input, $suffix)
 {
     if (endsWith($input, $suffix)) {
-
         return mb_substr($input, 0, mb_strlen($input) - mb_strlen($suffix));
     }
 
@@ -654,7 +653,7 @@ function stripPunctuation($string)
  */
 function swapCase($string, $mb = false)
 {
-    return array_reduce(str_split($string), function($carry, $item) use ($mb) {
+    return array_reduce(str_split($string), function ($carry, $item) use ($mb) {
         return $carry .= isLower($item, $mb) ? toUpper($item, $mb) : toLower($item, $mb);
     }, '');
 }
diff --git a/src/Tests/Collection/CollectionFirstNTest.php b/src/Tests/Collection/CollectionFirstNTest.php
index 50fa8ed..39d9879 100644
--- a/src/Tests/Collection/CollectionFirstNTest.php
+++ b/src/Tests/Collection/CollectionFirstNTest.php
@@ -12,10 +12,9 @@
  */
 class CollectionFirstNTest extends \PHPUnit_Framework_TestCase
 {
-
     public function testFirst()
     {
-        $array  = range(1,9);
+        $array  = range(1, 9);
 
         $result = Collection\firstN($array, 3);
         $this->assertEquals([1, 2, 3], $result);
diff --git a/src/Tests/Collection/CollectionFirstTest.php b/src/Tests/Collection/CollectionFirstTest.php
index f85686d..c8e47e3 100644
--- a/src/Tests/Collection/CollectionFirstTest.php
+++ b/src/Tests/Collection/CollectionFirstTest.php
@@ -12,10 +12,9 @@
  */
 class CollectionFirstTest extends \PHPUnit_Framework_TestCase
 {
-
     public function testFirst()
     {
-        $array  = range(1,9);
+        $array  = range(1, 9);
 
         $result = Collection\first($array);
         $this->assertEquals(1, $result);
diff --git a/src/Tests/Collection/CollectionLastNTest.php b/src/Tests/Collection/CollectionLastNTest.php
index 7a78762..0ce5e86 100644
--- a/src/Tests/Collection/CollectionLastNTest.php
+++ b/src/Tests/Collection/CollectionLastNTest.php
@@ -12,10 +12,9 @@
  */
 class CollectionLastNTest extends \PHPUnit_Framework_TestCase
 {
-
     public function testLast()
     {
-        $array  = range(1,9);
+        $array  = range(1, 9);
 
         $result = Collection\lastN($array, 3);
         $this->assertEquals([7, 8, 9], $result);
diff --git a/src/Tests/Collection/CollectionLastTest.php b/src/Tests/Collection/CollectionLastTest.php
index 7f44727..c5ca580 100644
--- a/src/Tests/Collection/CollectionLastTest.php
+++ b/src/Tests/Collection/CollectionLastTest.php
@@ -12,10 +12,9 @@
  */
 class CollectionLastTest extends \PHPUnit_Framework_TestCase
 {
-
     public function testLast()
     {
-        $array  = range(1,9);
+        $array  = range(1, 9);
 
         $result = Collection\last($array);
         $this->assertEquals(9, $result);
diff --git a/src/Tests/IfSetOrTest.php b/src/Tests/IfSetOrTest.php
index 51f257a..c23662b 100644
--- a/src/Tests/IfSetOrTest.php
+++ b/src/Tests/IfSetOrTest.php
@@ -17,7 +17,7 @@ public function testIsNotSet()
         $this->assertNull(Funct\ifSetOr($foo));
         $this->assertEquals('bar', Funct\ifSetOr($foo2, 'bar'));
     }
-    
+
     public function testIsSet()
     {
         $foo = 'foo';
diff --git a/src/Tests/Invoke/InvokeIfIssetTest.php b/src/Tests/Invoke/InvokeIfIssetTest.php
index c7c33e9..e9d1e91 100644
--- a/src/Tests/Invoke/InvokeIfIssetTest.php
+++ b/src/Tests/Invoke/InvokeIfIssetTest.php
@@ -3,7 +3,7 @@
 namespace Funct\Tests\Invoke;
 
 use Funct\Invoke;
-use Funct\Tests\Fixtures\SampleObject;;
+use Funct\Tests\Fixtures\SampleObject;
 
 /**
  * Class InvokeIfIssetTest
diff --git a/src/Tests/Invoke/InvokeIfNotEmptyTest.php b/src/Tests/Invoke/InvokeIfNotEmptyTest.php
index 05390cb..3669ddd 100644
--- a/src/Tests/Invoke/InvokeIfNotEmptyTest.php
+++ b/src/Tests/Invoke/InvokeIfNotEmptyTest.php
@@ -3,7 +3,7 @@
 namespace Funct\Tests\Invoke;
 
 use Funct\Invoke;
-use Funct\Tests\Fixtures\SampleObject;;
+use Funct\Tests\Fixtures\SampleObject;
 
 /**
  * Class InvokeIfNotEmptyTest
diff --git a/src/Tests/Objects/AssignIfIssetTest.php b/src/Tests/Objects/AssignIfIssetTest.php
index e5b64b9..9d84470 100644
--- a/src/Tests/Objects/AssignIfIssetTest.php
+++ b/src/Tests/Objects/AssignIfIssetTest.php
@@ -12,7 +12,6 @@
  */
 class AssignIfIssetTest extends \PHPUnit_Framework_TestCase
 {
-
     public function testMethod()
     {
         $object = new \stdClass();
diff --git a/src/Tests/Strings/StringsChompLeftTest.php b/src/Tests/Strings/StringsChompLeftTest.php
index ebd5a0b..7341f53 100644
--- a/src/Tests/Strings/StringsChompLeftTest.php
+++ b/src/Tests/Strings/StringsChompLeftTest.php
@@ -2,7 +2,7 @@
 
 namespace Funct\Tests\Strings;
 
-use Funct\Strings;;
+use Funct\Strings;
 
 /**
  * Class StringsChompLeftTest
diff --git a/src/Tests/Strings/StringsIncludesTest.php b/src/Tests/Strings/StringsIncludesTest.php
index 98a2037..d1bc712 100644
--- a/src/Tests/Strings/StringsIncludesTest.php
+++ b/src/Tests/Strings/StringsIncludesTest.php
@@ -21,7 +21,7 @@ public function dataStringIncludes()
         $out[] = ['foo bar', 'foo', true];
         $out[] = ['foo&%$bar@;/', 'bar', true];
         $out[] = ['foo BAR', 'bar', false];
-        
+
         return $out;
     }
 
diff --git a/src/Tests/Strings/StringsLatinizeTest.php b/src/Tests/Strings/StringsLatinizeTest.php
index 076da57..1b76680 100644
--- a/src/Tests/Strings/StringsLatinizeTest.php
+++ b/src/Tests/Strings/StringsLatinizeTest.php
@@ -16,12 +16,18 @@ public function dataStringLatinize()
     {
         $out = [];
 
-        $out[] = ['Dès Noël où un zéphyr haï me vêt de glaçons würmiens je dîne d’exquis rôtis de bœuf au kir à l’aÿ d’âge mûr & cætera !',
-            'Des Noel ou un zephyr hai me vet de glacons wurmiens je dine d’exquis rotis de boeuf au kir a l’ay d’age mur & caetera !'];
-        $out[] = ['Benjamín pidió una bebida de kiwi y fresa; Noé, sin vergüenza, la más exquisita champaña del menú.',
-            'Benjamin pidio una bebida de kiwi y fresa; Noe, sin verguenza, la mas exquisita champana del menu.'];
-        $out[] = ['Falsches Üben von Xylophonmusik quält jeden größeren Zwerg.',
-            'Falsches Uben von Xylophonmusik qualt jeden grosseren Zwerg.'];
+        $out[] = [
+            'Dès Noël où un zéphyr haï me vêt de glaçons würmiens je dîne d’exquis rôtis de bœuf au kir à l’aÿ d’âge mûr & cætera !',
+            'Des Noel ou un zephyr hai me vet de glacons wurmiens je dine d’exquis rotis de boeuf au kir a l’ay d’age mur & caetera !'
+        ];
+        $out[] = [
+            'Benjamín pidió una bebida de kiwi y fresa; Noé, sin vergüenza, la más exquisita champaña del menú.',
+            'Benjamin pidio una bebida de kiwi y fresa; Noe, sin verguenza, la mas exquisita champana del menu.'
+        ];
+        $out[] = [
+            'Falsches Üben von Xylophonmusik quält jeden größeren Zwerg.',
+            'Falsches Uben von Xylophonmusik qualt jeden grosseren Zwerg.'
+        ];
 
         return $out;
     }
diff --git a/src/Tests/Strings/StringsToLowerTest.php b/src/Tests/Strings/StringsToLowerTest.php
index 8000192..6b39941 100644
--- a/src/Tests/Strings/StringsToLowerTest.php
+++ b/src/Tests/Strings/StringsToLowerTest.php
@@ -38,4 +38,4 @@ public function testStringToLower($input, $mb, $expected)
     {
         $this->assertEquals($expected, Strings\toLower($input, $mb));
     }
-}
\ No newline at end of file
+}