diff --git a/src/Form/SmoothScroll.php b/src/Form/SmoothScroll.php
index 3b6109c..de9b5d7 100644
--- a/src/Form/SmoothScroll.php
+++ b/src/Form/SmoothScroll.php
@@ -31,11 +31,11 @@ class SmoothScroll extends ConfigFormBase {
   public function buildForm(array $form, FormStateInterface $form_state) {
     // kint($this);
     $config = $this->config('smooth_mouse_scrolling.settings');
-    $form['step'] = array(
+    $form['step'] = [
       '#type' => 'textfield',
-      '#attributes' => array(
+      '#attributes' => [
           'data-type' => 'number',
-      ),
+      ],
       '#title' => 'Step',
       '#width' => '30%',
       '#align' => 'center',
@@ -43,12 +43,12 @@ class SmoothScroll extends ConfigFormBase {
       '#description' => t('Enter the scroll step.'),
       '#default_value' => isset($config) ? $config->get('step') : '', 
       '#maxlength' => 10
-    );
-    $form['speed'] = array(
+    ];
+    $form['speed'] = [
       '#type' => 'textfield',
-      '#attributes' => array(
+      '#attributes' => [
           'data-type' => 'number',
-      ),
+      ],
       '#title' => 'Speed',
       '#width' => '30%',
       '#align' => 'center',
@@ -56,14 +56,14 @@ class SmoothScroll extends ConfigFormBase {
       '#description' => t('Enter the scroll speed.'),
       '#default_value' => isset($config)? $config->get('speed') : '',
       '#maxlength' => 10
-    );
+    ];
 
     $form['actions']['#type'] = 'actions';
-    $form['actions']['submit'] = array(
+    $form['actions']['submit'] = [
       '#type' => 'submit',
       '#value' => $this->t('Save'),
       '#button_type' => 'primary',
-    );
+    ];
     return $form;
   }
 
@@ -95,4 +95,4 @@ class SmoothScroll extends ConfigFormBase {
       ->save();
     parent::submitForm($form, $form_state);
    }
-}
\ No newline at end of file
+}