diff --git a/composer.json b/composer.json
index e19bd97..5c0b436 100644
--- a/composer.json
+++ b/composer.json
@@ -36,5 +36,12 @@
     },
     "config": {
         "sort-packages": true
+    },
+    "require-dev": {
+        "squizlabs/php_codesniffer": "^3.7"
+    },
+    "scripts": {
+        "phpcs": "phpcs",
+        "phpcbf": "phpcbf"
     }
 }
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
index 0000000..13d8a3b
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0"?>
+<ruleset name="ToArrayInterface">
+    <description>PHP_CodeSniffer configuration for the ToArrayInterface package</description>
+
+    <!-- Show progress -->
+    <arg value="sp"/>
+
+    <!-- Check all files in the src directory -->
+    <file>src</file>
+
+    <!-- Include the PSR-12 standard -->
+    <rule ref="PSR12">
+    </rule>
+
+</ruleset>
diff --git a/src/ToArrayInterface.php b/src/ToArrayInterface.php
index d49aa48..ae69005 100644
--- a/src/ToArrayInterface.php
+++ b/src/ToArrayInterface.php
@@ -1,4 +1,5 @@
 <?php
+
 declare(strict_types=1);
 
 namespace Imponeer;
@@ -8,10 +9,10 @@
  */
 interface ToArrayInterface
 {
-	/**
-	 * Converts object to array
-	 *
-	 * @return array
-	 */
-	public function toArray(): array;
+    /**
+     * Converts object to array
+     *
+     * @return array
+     */
+    public function toArray(): array;
 }