diff --git a/Classes/Domain/Service/SendMailService.php b/Classes/Domain/Service/SendMailService.php
index 05fbb88..29a7966 100644
--- a/Classes/Domain/Service/SendMailService.php
+++ b/Classes/Domain/Service/SendMailService.php
@@ -1,7 +1,6 @@
 <?php
 namespace In2code\Powermailextended\Domain\Service;
 
-use In2code\Powermail\Domain\Model\Mail;
 use TYPO3\CMS\Core\Mail\MailMessage;
 
 /**
@@ -21,9 +20,9 @@ public function manipulateMail($message)
     {
         // overwrite the receiver
         $message->setTo(
-            array(
+            [
                 'anotheremail@domain.org' => 'receiverName'
-            )
+            ]
         );
     }
 }
diff --git a/Classes/Domain/Validator/ZipValidator.php b/Classes/Domain/Validator/ZipValidator.php
index 21dfa9b..4b04f45 100755
--- a/Classes/Domain/Validator/ZipValidator.php
+++ b/Classes/Domain/Validator/ZipValidator.php
@@ -11,11 +11,11 @@ class ZipValidator
      * Check if given number is higher than in configuration
      *
      * @param string $value
-     * @param string $validationConfiguration
+     * @param string $validationConfig
      * @return bool
      */
-    public function validate100($value, $validationConfiguration)
+    public function validate100($value, $validationConfig)
     {
-        return is_numeric($value) && $value >= $validationConfiguration;
+        return is_numeric($value) && $value >= $validationConfig;
     }
 }
diff --git a/ext_emconf.php b/ext_emconf.php
index 3b6198a..ad7480f 100755
--- a/ext_emconf.php
+++ b/ext_emconf.php
@@ -10,35 +10,36 @@
  * writing. "version" and "dependencies" must not be touched!
  ***************************************************************/
 
-$EM_CONF[$_EXTKEY] = array (
-	'title' => 'powermailextended',
-	'description' => 'Sample Extension to extend powermail: Add new validators, Add new Fieldtypes or Add new Field Properties',
-	'category' => 'plugin',
-	'shy' => 0,
-	'version' => '3.0.0',
-	'dependencies' => '',
-	'conflicts' => '',
-	'priority' => '',
-	'loadOrder' => '',
-	'module' => '',
-	'state' => 'beta',
-	'uploadfolder' => 0,
-	'createDirs' => 'uploads/tx_powermail',
-	'modify_tables' => '',
-	'clearcacheonload' => 0,
-	'lockType' => '',
-	'author' => 'Powermail dev team',
-	'author_email' => 'alexander.kellner@in2code.de',
-	'author_company' => 'in2code.de',
-	'CGLcompliance' => '',
-	'CGLcompliance_note' => '',
-	'constraints' => array(
-		'depends' => array(
-			'typo3' => '7.6.0-8.99.99',
-			'powermail' => '3.0.0-3.99.99',
-		),
-		'conflicts' => array(),
-		'suggests' => array(),
-	),
-	'_md5_values_when_last_written' => '',
-);
+$EM_CONF[$_EXTKEY] = [
+    'title' => 'powermailextended',
+    'description' => 'Sample Extension to extend powermail: 
+        Add new validators, Add new Fieldtypes or Add new Field Properties',
+    'category' => 'plugin',
+    'shy' => 0,
+    'version' => '3.0.0',
+    'dependencies' => '',
+    'conflicts' => '',
+    'priority' => '',
+    'loadOrder' => '',
+    'module' => '',
+    'state' => 'beta',
+    'uploadfolder' => 0,
+    'createDirs' => 'uploads/tx_powermail',
+    'modify_tables' => '',
+    'clearcacheonload' => 0,
+    'lockType' => '',
+    'author' => 'Powermail dev team',
+    'author_email' => 'alexander.kellner@in2code.de',
+    'author_company' => 'in2code.de',
+    'CGLcompliance' => '',
+    'CGLcompliance_note' => '',
+    'constraints' => [
+        'depends' => [
+            'typo3' => '7.6.0-8.99.99',
+            'powermail' => '3.0.0-3.99.99',
+        ],
+        'conflicts' => [],
+        'suggests' => [],
+    ],
+    '_md5_values_when_last_written' => '',
+];
diff --git a/ext_localconf.php b/ext_localconf.php
index 9574015..4cb173a 100755
--- a/ext_localconf.php
+++ b/ext_localconf.php
@@ -3,22 +3,24 @@
  * Register some Slots
  */
 /** @var \TYPO3\CMS\Extbase\SignalSlot\Dispatcher $signalSlotDispatcher */
-$signalSlotDispatcher = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance('TYPO3\\CMS\\Extbase\\SignalSlot\Dispatcher');
+$signalSlotDispatcher = \TYPO3\CMS\Core\Utility\GeneralUtility::makeInstance(
+    \TYPO3\CMS\Extbase\SignalSlot\Dispatcher::class
+);
 
 // Manipulate a value before sending
 //$signalSlotDispatcher->connect(
-//	'In2code\Powermail\Controller\FormController',
-//	'createActionBeforeRenderView',
-//	'In2code\Powermailextended\Controller\FormController',
-//	'manipulateMailObjectOnCreate',
-//	FALSE
+//    'In2code\Powermail\Controller\FormController',
+//    'createActionBeforeRenderView',
+//    'In2code\Powermailextended\Controller\FormController',
+//    'manipulateMailObjectOnCreate',
+//    false
 //);
 
 // Change receiver mail
 //$signalSlotDispatcher->connect(
-//	'In2code\Powermail\Domain\Service\SendMailService',
-//	'sendTemplateEmailBeforeSend',
-//	'In2code\Powermailextended\Domain\Service\SendMailService',
-//	'manipulateMail',
-//	FALSE
+//    'In2code\Powermail\Domain\Service\SendMailService',
+//    'sendTemplateEmailBeforeSend',
+//    'In2code\Powermailextended\Domain\Service\SendMailService',
+//    'manipulateMail',
+//    false
 //);
diff --git a/ext_tables.php b/ext_tables.php
index db1d946..213b11a 100644
--- a/ext_tables.php
+++ b/ext_tables.php
@@ -3,39 +3,36 @@
  * Include Static TypoScript
  */
 \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile(
-	$_EXTKEY,
-	'Configuration/TypoScript',
-	'Powermail Addition (after Powermail Template)'
+    $_EXTKEY,
+    'Configuration/TypoScript',
+    'Powermail Addition (after Powermail Template)'
 );
 
 /**
  * extend powermail fields tx_powermail_domain_model_field
  */
-$tempColumns = array (
-	'tx_powermailextended_powermail_text' => array(
-		'exclude' => 1,
-		'label' => 'Text before field',
-		'config' => array (
-			'type' => 'text',
-			'cols' => '32',
-			'rows' => '2'
-		)
-	),
-	'tx_powermailextended_powermail_readonly' => array(
-		'exclude' => 1,
-		'label' => 'Readonly',
-		'config' => array (
-			'type' => 'check'
-		)
-	),
-);
-\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns(
-	'tx_powermail_domain_model_field',
-	$tempColumns
-);
+$tempColumns = [
+    'tx_powermailextended_powermail_text' => [
+        'exclude' => 1,
+        'label' => 'Text before field',
+        'config' => [
+            'type' => 'text',
+            'cols' => '32',
+            'rows' => '2'
+        ]
+    ],
+    'tx_powermailextended_powermail_readonly' => [
+        'exclude' => 1,
+        'label' => 'Readonly',
+        'config' => [
+            'type' => 'check'
+        ]
+    ],
+];
+\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTCAcolumns('tx_powermail_domain_model_field', $tempColumns);
 \TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addToAllTCAtypes(
-	'tx_powermail_domain_model_field',
-	'--div--;Powermailextended, tx_powermailextended_powermail_text, tx_powermailextended_powermail_readonly',
-	'',
-	'after:own_marker_select'
+    'tx_powermail_domain_model_field',
+    '--div--;Powermailextended, tx_powermailextended_powermail_text, tx_powermailextended_powermail_readonly',
+    '',
+    'after:own_marker_select'
 );