diff --git a/.gitignore b/.gitignore
index c08ae891..0592df05 100644
--- a/.gitignore
+++ b/.gitignore
@@ -77,4 +77,3 @@ vendor/
 tmp/
 
 .DS_STORE
-
diff --git a/.php_cs b/.php_cs
new file mode 100644
index 00000000..1c3afccf
--- /dev/null
+++ b/.php_cs
@@ -0,0 +1,31 @@
+<?php
+$finder = PhpCsFixer\Finder::create()
+    ->in(__DIR__ . "/src");
+
+return PhpCsFixer\Config::create()
+    ->setRules(
+        [
+            '@PSR2'                               => true,
+            'array_syntax'                        => [
+                'syntax' => 'short'
+            ],
+            'class_keyword_remove'                => false,
+            'concat_space'                        => [
+                'spacing' => 'one'
+            ],
+            'combine_consecutive_unsets'          => true,
+            'general_phpdoc_annotation_remove'    => [
+                'annotations' => ['@author'],
+            ],
+            'linebreak_after_opening_tag'         => true,
+            'no_short_echo_tag'                   => true,
+            'no_useless_return'                   => true,
+            'not_operator_with_space'             => false,
+            'not_operator_with_successor_space'   => false,
+            'ordered_imports'                     => true,
+            'phpdoc_add_missing_param_annotation' => true,
+            'protected_to_private'                => true,
+            'semicolon_after_instruction'         => true,
+        ]
+    )
+    ->setFinder($finder);
diff --git a/composer.json b/composer.json
index 58606889..c6b82ceb 100644
--- a/composer.json
+++ b/composer.json
@@ -37,18 +37,19 @@
         }
     },
     "require-dev": {
+        "friendsofphp/php-cs-fixer": "^2.4",
+        "jakub-onderka/php-parallel-lint": "^0.9.2",
+        "phpro/grumphp": "^0.11.6",
         "phpunit/phpunit": "^5.7",
-        "friendsofphp/php-cs-fixer": "^2.4"
+        "sensiolabs/security-checker": "^4.1"
     },
     "bin": [
         "bin/bunq-install"
     ],
-    "scripts": {
-        "phpcs": [
-            "./vendor/bin/php-cs-fixer fix -v --dry-run --using-cache=no src"
-        ],
-        "phpcs-fix": [
-            "./vendor/bin/php-cs-fixer fix -v --using-cache=no src"
-        ]
+    "config": {
+        "sort-packages": true,
+        "platform": {
+            "php": "5.6"
+        }
     }
 }
diff --git a/grumphp.yml b/grumphp.yml
new file mode 100644
index 00000000..35139875
--- /dev/null
+++ b/grumphp.yml
@@ -0,0 +1,75 @@
+parameters:
+    bin_dir: "./vendor/bin"
+    git_dir: "."
+    hide_circumvention_tip: false
+    hooks_dir: ~
+    hooks_preset: local
+    ignore_unstaged_changes: false
+    process_async_limit: 10
+    process_async_wait: 1000
+    process_timeout: 60
+    stop_on_failure: true
+    ascii:
+        failed: ~
+        succeeded: ~
+    tasks:
+        composer:
+            file: ./composer.json
+            no_check_all: false
+            no_check_lock: false
+            no_check_publish: false
+            with_dependencies: false
+            strict: true
+        git_blacklist:
+            keywords:
+                - "die("
+                - "dump("
+                - "exit;"
+                - "print_r("
+                - "print_rr("
+                - "var_dump("
+            triggered_by: ['php']
+        phpcpd:
+            directory: '.'
+            exclude: ['vendor']
+            names_exclude: []
+            fuzzy: false
+            min_lines: 5
+            min_tokens: 70
+            triggered_by: ['php']
+        phpcsfixer2:
+            allow_risky: false
+            cache_file: ~
+            config: ~
+            rules: []
+            using_cache: true
+            path_mode: ~
+            verbose: true
+        phplint:
+            exclude: ['vendor']
+            jobs: ~
+            triggered_by: ['php', 'phtml']
+        phpunit:
+            config_file: ~
+            testsuite: ~
+            group: []
+            always_execute: false
+        phpversion:
+            project: '5.6'
+        securitychecker:
+            lockfile: ./composer.lock
+            format: ~
+            end_point: ~
+            timeout: ~
+            run_always: true
+        xmllint:
+            ignore_patterns: []
+            load_from_net: false
+            x_include: false
+            dtd_validation: false
+            scheme_validation: false
+            triggered_by: ['xml']
+        yamllint:
+            ignore_patterns: []
+            object_support: false
+            exception_on_invalid_type: true
diff --git a/src/Util/InstallationUtil.php b/src/Util/InstallationUtil.php
index 6a3684d1..33161573 100644
--- a/src/Util/InstallationUtil.php
+++ b/src/Util/InstallationUtil.php
@@ -79,7 +79,7 @@ public static function interactiveInstall()
             );
             $methodInitializeInstallationContext->invoke($context);
 
-            $description = static::readline(self::PROMPT_DESCRIPTION, self::ERROR_EMPTY_DESCRIPTION);
+            $description = static::readLine(self::PROMPT_DESCRIPTION, self::ERROR_EMPTY_DESCRIPTION);
             $permittedIpsInput = static::readLineOrNull(self::PROMPT_PERMITTED_IPS);
             $permittedIps = static::formatIps($permittedIpsInput);
             $methodRegisterDevice = static::createAccessibleReflectionMethod(ApiContext::class, self::METHOD_REGISTER_DEVICE);