diff --git a/.gitignore b/.gitignore
index 14f4019..e58b8bd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,4 @@
 vendor
 composer.lock
 .phpunit.result.cache
+.php_cs.cache
diff --git a/.php_cs b/.php_cs
index 05be562..300c9da 100644
--- a/.php_cs
+++ b/.php_cs
@@ -1,35 +1,58 @@
 <?php
 
 return PhpCsFixer\Config::create()
-    ->setUsingCache(false)
+    ->setUsingCache(true)
+    ->setCacheFile(__DIR__ . '/.php_cs.cache')
     ->setRules([
         '@PSR2' => true,
+        'align_multiline_comment' => true,
+        'array_indentation' => true,
         'array_syntax' => ['syntax' => 'short'],
-        'ordered_imports' => true,
-        'no_whitespace_in_blank_line' => true,
-        'no_unused_imports' => true,
-        'blank_line_before_return' => true,
         'binary_operator_spaces' => true,
+        'blank_line_before_statement' => ['statements' => ['return']],
         'cast_spaces' => true,
+        'concat_space' => ['spacing' => 'one'],
+        'constant_case' => true,
         'declare_equal_normalize' => true,
+        'lowercase_cast' => true,
         'method_argument_space' => true,
         'method_separation' => true,
+        'no_empty_statement' => true,
+        'no_leading_import_slash' => true,
         'no_leading_namespace_whitespace' => true,
         'no_multiline_whitespace_around_double_arrow' => true,
+        'no_multiline_whitespace_before_semicolons' => true,
+        'no_unused_imports' => true,
         'no_whitespace_before_comma_in_array' => true,
-        'trim_array_spaces' => true,
+        'no_whitespace_in_blank_line' => true,
+        'ordered_imports' => true,
         'phpdoc_add_missing_param_annotation' => true,
         'phpdoc_align' => true,
-        'phpdoc_scalar' => true,
+        'phpdoc_annotation_without_dot' => true,
         'phpdoc_indent' => true,
+        'phpdoc_no_empty_return' => true,
+        'phpdoc_no_useless_inheritdoc' => true,
         'phpdoc_order' => true,
+        'phpdoc_return_self_reference' => true,
+        'phpdoc_scalar' => true,
         'phpdoc_separation' => true,
-        'no_empty_statement' => true,
-        'concat_space' => ['spacing' => 'one'],
-        'no_multiline_whitespace_before_semicolons' => true,
-        'no_leading_import_slash' => true,
+        'phpdoc_single_line_var_spacing' => true,
+        'phpdoc_trim' => true,
+        'phpdoc_trim_consecutive_blank_line_separation' => true,
+        'phpdoc_types_order' => true,
+        'phpdoc_var_annotation_correct_order' => true,
+        'phpdoc_var_without_name' => true,
+        'single_quote' => true,
+        'short_scalar_cast' => true,
+        'standardize_not_equals' => true,
+        'ternary_operator_spaces' => true,
+        'ternary_to_null_coalescing' => true,
+        'trim_array_spaces' => true,
+        'visibility_required' => ['elements' => ['property', 'method', 'const']],
+        'yoda_style' => false,
     ])
     ->setFinder(
         PhpCsFixer\Finder::create()
+            ->exclude('db')
             ->in(__DIR__)
     );
diff --git a/.travis.yml b/.travis.yml
index dedbc4e..2e93b90 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ language: php
 php:
   - 7.2
   - 7.3
+  - 7.4
 
 install:
   - travis_retry composer self-update
diff --git a/composer.json b/composer.json
index 34b3434..6136869 100644
--- a/composer.json
+++ b/composer.json
@@ -3,19 +3,22 @@
   "description": "PHP bank cards IIN/BIN database. Get bank info by card number",
   "license": "MIT",
   "keywords": ["bin", "card", "creditcard", "iin", "issuer identification numbers"],
-  "homepage": "https://github.com/chekalskiy/php-banks-db",
+  "homepage": "https://github.com/chekalsky/php-banks-db",
   "authors": [
     {
-      "name": "Ilya Chekalskiy",
-      "email": "ilya@chekalskiy.ru",
-      "homepage": "http://chekalskiy.ru"
+      "name": "Ilya Chekalsky",
+      "email": "ilya@chekalsky.com",
+      "homepage": "https://chekalsky.com"
     }
   ],
   "require": {
     "php": ">=7.2"
   },
   "require-dev": {
-    "phpunit/phpunit": "^8"
+    "ext-json": "*",
+    "friendsofphp/php-cs-fixer": "^2.16",
+    "phpunit/phpunit": "^8",
+    "squizlabs/php_codesniffer": "^3.5"
   },
   "autoload": {
     "psr-4": {
@@ -26,6 +29,10 @@
     "test": [
       "vendor/bin/phpunit --coverage-clover=coverage.xml"
     ],
+    "lint": [
+      "vendor/bin/php-cs-fixer fix --config=.php_cs",
+      "vendor/bin/phpcbf -w"
+    ],
     "rebuild": [
       "php parse.php"
     ]
diff --git a/parse.php b/parse.php
index 7075edf..7ebadf7 100644
--- a/parse.php
+++ b/parse.php
@@ -1,4 +1,7 @@
 <?php
+
+declare(strict_types=1);
+
 /**
  * This script needed only for one-time building the database after the submodule update
  */
@@ -78,9 +81,11 @@
 $database_export = sprintf('<?php return %s;', var_export($database, true));
 
 if (file_put_contents('db/bank_db.php', $database_export)) {
-    echo sprintf("Successfully exported %d prefixes for %d banks with prefixes\n",
+    echo sprintf(
+        "Successfully exported %d prefixes for %d banks with prefixes\n",
         count($database['prefixes']),
-        count($database['banks']));
+        count($database['banks'])
+    );
 }
 
 function printError(string $text)
@@ -97,4 +102,4 @@ function addPrefix(int $prefix, int $bank_id, array &$database)
     }
 
     $database['prefixes'][$prefix] = $bank_id;
-}
\ No newline at end of file
+}
diff --git a/phpcs.xml b/phpcs.xml
new file mode 100644
index 0000000..66b8691
--- /dev/null
+++ b/phpcs.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<ruleset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="vendor/squizlabs/php_codesniffer/phpcs.xsd">
+
+    <arg name="basepath" value="."/>
+    <arg name="cache" value=".phpcs-cache"/>
+    <arg name="colors"/>
+    <arg name="extensions" value="php"/>
+    <arg value="np"/>
+
+    <rule ref="PSR12"/>
+
+    <file>parse.php</file>
+    <file>src/</file>
+    <file>tests/</file>
+
+</ruleset>
diff --git a/src/BankDb.php b/src/BankDb.php
index 4f229af..45f86da 100644
--- a/src/BankDb.php
+++ b/src/BankDb.php
@@ -1,4 +1,5 @@
 <?php
+
 declare(strict_types=1);
 
 namespace BankDb;
@@ -18,7 +19,7 @@ class BankDb
     /**
      * BankDb constructor.
      *
-     * @param string|null $db_file_path
+     * @param null|string $db_file_path
      *
      * @throws BankDbException
      */
@@ -50,7 +51,7 @@ public function getBankInfo(string $card_number): BankInfo
     /**
      * Database init
      *
-     * @param string|null $file_path
+     * @param null|string $file_path
      *
      * @throws BankDbException
      */
diff --git a/src/BankDbException.php b/src/BankDbException.php
index 494e086..c7e11ec 100644
--- a/src/BankDbException.php
+++ b/src/BankDbException.php
@@ -1,4 +1,5 @@
 <?php
+
 declare(strict_types=1);
 
 namespace BankDb;
diff --git a/src/BankInfo.php b/src/BankInfo.php
index 58b614d..ce93eac 100644
--- a/src/BankInfo.php
+++ b/src/BankInfo.php
@@ -1,4 +1,5 @@
 <?php
+
 declare(strict_types=1);
 
 namespace BankDb;
diff --git a/tests/BankDbTest.php b/tests/BankDbTest.php
index 7867476..a0450e4 100644
--- a/tests/BankDbTest.php
+++ b/tests/BankDbTest.php
@@ -1,4 +1,5 @@
 <?php
+
 declare(strict_types=1);
 
 namespace BankDb;
diff --git a/tests/BankInfoTest.php b/tests/BankInfoTest.php
index 9cd7adc..e59dcce 100644
--- a/tests/BankInfoTest.php
+++ b/tests/BankInfoTest.php
@@ -1,4 +1,5 @@
 <?php
+
 declare(strict_types=1);
 
 namespace BankDb;