diff --git a/DependencyInjection/Configuration.php b/DependencyInjection/Configuration.php
index 5bd9542..9e267c8 100644
--- a/DependencyInjection/Configuration.php
+++ b/DependencyInjection/Configuration.php
@@ -15,7 +15,7 @@ class Configuration implements ConfigurationInterface
     /**
      * {@inheritDoc}
      */
-    public function getConfigTreeBuilder()
+    public function getConfigTreeBuilder(): TreeBuilder
     {
         $treeBuilder = new TreeBuilder('tetranz_select2_entity');
         $rootNode = $treeBuilder->getRootNode();
diff --git a/DependencyInjection/TetranzSelect2EntityExtension.php b/DependencyInjection/TetranzSelect2EntityExtension.php
index c1cd2a3..e64c73e 100644
--- a/DependencyInjection/TetranzSelect2EntityExtension.php
+++ b/DependencyInjection/TetranzSelect2EntityExtension.php
@@ -17,7 +17,7 @@ class TetranzSelect2EntityExtension extends Extension
     /**
      * {@inheritDoc}
      */
-    public function load(array $configs, ContainerBuilder $container)
+    public function load(array $configs, ContainerBuilder $container): void
     {
         $configuration = new Configuration();
         $config = $this->processConfiguration($configuration, $configs);
diff --git a/Form/DataTransformer/EntitiesToPropertyTransformer.php b/Form/DataTransformer/EntitiesToPropertyTransformer.php
index d6a9fd8..c66bcec 100644
--- a/Form/DataTransformer/EntitiesToPropertyTransformer.php
+++ b/Form/DataTransformer/EntitiesToPropertyTransformer.php
@@ -26,20 +26,26 @@ class EntitiesToPropertyTransformer implements DataTransformerInterface
     protected $primaryKey;
     /** @var  string */
     protected $newTagPrefix;
-    /** @var string  */
+    /** @var string */
     protected $newTagText;
     /** @var PropertyAccessor */
     protected $accessor;
 
     /**
-     * @param ObjectManager $em
-     * @param string $class
-     * @param string|null $textProperty
-     * @param string $primaryKey
-     * @param string $newTagPrefix
+     * @param  ObjectManager  $em
+     * @param  string  $class
+     * @param  string|null  $textProperty
+     * @param  string  $primaryKey
+     * @param  string  $newTagPrefix
      */
-    public function __construct(ObjectManager $em, $class, $textProperty = null, $primaryKey = 'id', $newTagPrefix = '__', $newTagText = ' (NEW)')
-    {
+    public function __construct(
+        ObjectManager $em,
+        $class,
+        $textProperty = null,
+        $primaryKey = 'id',
+        $newTagPrefix = '__',
+        $newTagText = ' (NEW)'
+    ) {
         $this->em = $em;
         $this->className = $class;
         $this->textProperty = $textProperty;
@@ -52,10 +58,10 @@ public function __construct(ObjectManager $em, $class, $textProperty = null, $pr
     /**
      * Transform initial entities to array
      *
-     * @param mixed $entities
+     * @param  mixed  $entities
      * @return array
      */
-    public function transform($entities)
+    public function transform($entities): array
     {
         if (empty($entities)) {
             return array();
@@ -65,13 +71,13 @@ public function transform($entities)
 
         foreach ($entities as $entity) {
             $text = is_null($this->textProperty)
-                ? (string) $entity
+                ? (string)$entity
                 : $this->accessor->getValue($entity, $this->textProperty);
 
             if ($this->em->contains($entity)) {
-                $value = (string) $this->accessor->getValue($entity, $this->primaryKey);
+                $value = (string)$this->accessor->getValue($entity, $this->primaryKey);
             } else {
-                $value = $this->newTagPrefix . $text;
+                $value = $this->newTagPrefix.$text;
                 $text = $text.$this->newTagText;
             }
 
@@ -84,17 +90,17 @@ public function transform($entities)
     /**
      * Transform array to a collection of entities
      *
-     * @param array $values
+     * @param  array  $values
      * @return array
      */
-    public function reverseTransform($values)
+    public function reverseTransform($values): array
     {
         if (!is_array($values) || empty($values)) {
-            return array();
+            return [];
         }
 
         // add new tag entries
-        $newObjects = array();
+        $newObjects = [];
         $tagPrefixLength = strlen($this->newTagPrefix);
         foreach ($values as $key => $value) {
             $cleanValue = substr($value, $tagPrefixLength);
@@ -116,7 +122,7 @@ public function reverseTransform($values)
             ->getQuery()
             ->getResult();
 
-          // this will happen if the form submits invalid data
+        // this will happen if the form submits invalid data
         if (count($entities) != count($values)) {
             throw new TransformationFailedException('One or more id values are invalid');
         }
diff --git a/Form/DataTransformer/EntityToPropertyTransformer.php b/Form/DataTransformer/EntityToPropertyTransformer.php
index 72a30a9..e8d23ff 100644
--- a/Form/DataTransformer/EntityToPropertyTransformer.php
+++ b/Form/DataTransformer/EntityToPropertyTransformer.php
@@ -18,29 +18,35 @@
 class EntityToPropertyTransformer implements DataTransformerInterface
 {
     /** @var ObjectManager */
-    protected $em;
+    protected ObjectManager $em;
     /** @var  string */
-    protected $className;
+    protected string $className;
     /** @var  string */
-    protected $textProperty;
+    protected string $textProperty;
     /** @var  string */
-    protected $primaryKey;
-    /** @var string  */
-    protected $newTagPrefix;
-    /** @var string  */
-    protected $newTagText;
+    protected string $primaryKey;
+    /** @var string */
+    protected string $newTagPrefix;
+    /** @var string */
+    protected string $newTagText;
     /** @var PropertyAccessor */
-    protected $accessor;
+    protected PropertyAccessor $accessor;
 
     /**
-     * @param ObjectManager $em
-     * @param string                 $class
-     * @param string|null            $textProperty
-     * @param string                 $primaryKey
-     * @param string                 $newTagPrefix
+     * @param  ObjectManager  $em
+     * @param  string  $class
+     * @param  string|null  $textProperty
+     * @param  string  $primaryKey
+     * @param  string  $newTagPrefix
      */
-    public function __construct(ObjectManager $em, $class, $textProperty = null, $primaryKey = 'id', $newTagPrefix = '__', $newTagText = ' (NEW)')
-    {
+    public function __construct(
+        ObjectManager $em,
+        $class,
+        $textProperty = null,
+        $primaryKey = 'id',
+        $newTagPrefix = '__',
+        $newTagText = ' (NEW)'
+    ) {
         $this->em = $em;
         $this->className = $class;
         $this->textProperty = $textProperty;
@@ -53,24 +59,24 @@ public function __construct(ObjectManager $em, $class, $textProperty = null, $pr
     /**
      * Transform entity to array
      *
-     * @param mixed $entity
+     * @param  mixed  $entity
      * @return array
      */
-    public function transform($entity)
+    public function transform($entity): array
     {
-        $data = array();
+        $data = [];
         if (empty($entity)) {
             return $data;
         }
 
         $text = is_null($this->textProperty)
-            ? (string) $entity
+            ? (string)$entity
             : $this->accessor->getValue($entity, $this->textProperty);
 
         if ($this->em->contains($entity)) {
-            $value = (string) $this->accessor->getValue($entity, $this->primaryKey);
+            $value = (string)$this->accessor->getValue($entity, $this->primaryKey);
         } else {
-            $value = $this->newTagPrefix . $text;
+            $value = $this->newTagPrefix.$text;
             $text = $text.$this->newTagText;
         }
 
@@ -82,10 +88,10 @@ public function transform($entity)
     /**
      * Transform single id value to an entity
      *
-     * @param string $value
-     * @return mixed|null|object
+     * @param  string  $value
+     * @return null|object
      */
-    public function reverseTransform($value)
+    public function reverseTransform($value): null|object
     {
         if (empty($value)) {
             return null;
@@ -109,10 +115,11 @@ public function reverseTransform($value)
                     ->setParameter('id', $value)
                     ->getQuery()
                     ->getSingleResult();
-            }
-            catch (\Doctrine\ORM\UnexpectedResultException $ex) {
+            } catch (\Doctrine\ORM\UnexpectedResultException $ex) {
                 // this will happen if the form submits invalid data
-                throw new TransformationFailedException(sprintf('The choice "%s" does not exist or is not unique', $value));
+                throw new TransformationFailedException(
+                    sprintf('The choice "%s" does not exist or is not unique', $value)
+                );
             }
         }
 
diff --git a/Form/Type/Select2EntityType.php b/Form/Type/Select2EntityType.php
index ad7f8d4..a007f17 100644
--- a/Form/Type/Select2EntityType.php
+++ b/Form/Type/Select2EntityType.php
@@ -45,7 +45,7 @@ public function __construct(ManagerRegistry $registry, RouterInterface $router,
         $this->config = $config;
     }
 
-    public function buildForm(FormBuilderInterface $builder, array $options)
+    public function buildForm(FormBuilderInterface $builder, array $options): void
     {
         // custom object manager for this entity, override the default entity manager ?
         if (isset($options['object_manager'])) {
@@ -97,7 +97,7 @@ public function buildForm(FormBuilderInterface $builder, array $options)
         $builder->addViewTransformer($transformer, true);
     }
 
-    public function finishView(FormView $view, FormInterface $form, array $options)
+    public function finishView(FormView $view, FormInterface $form, array $options): void
     {
         parent::finishView($view, $form, $options);
         // make variables available to the view
@@ -137,7 +137,7 @@ public function finishView(FormView $view, FormInterface $form, array $options)
     /**
      * @param OptionsResolver $resolver
      */
-    public function configureOptions(OptionsResolver $resolver)
+    public function configureOptions(OptionsResolver $resolver): void
     {
         $resolver->setDefaults([
                 'object_manager' => null,
@@ -183,7 +183,7 @@ public function configureOptions(OptionsResolver $resolver)
     /**
      * @return string
      */
-    public function getBlockPrefix()
+    public function getBlockPrefix(): string
     {
         return 'tetranz_select2entity';
     }
diff --git a/Service/AutocompleteService.php b/Service/AutocompleteService.php
index c4ba50a..de2bddd 100644
--- a/Service/AutocompleteService.php
+++ b/Service/AutocompleteService.php
@@ -14,12 +14,12 @@ class AutocompleteService
     /**
      * @var FormFactoryInterface
      */
-    private $formFactory;
+    private FormFactoryInterface $formFactory;
 
     /**
      * @var ManagerRegistry
      */
-    private $doctrine;
+    private ManagerRegistry $doctrine;
 
     /**
      * @param FormFactoryInterface $formFactory
diff --git a/TetranzSelect2EntityBundle.php b/TetranzSelect2EntityBundle.php
index a327226..499f746 100644
--- a/TetranzSelect2EntityBundle.php
+++ b/TetranzSelect2EntityBundle.php
@@ -2,6 +2,7 @@
 
 namespace Tetranz\Select2EntityBundle;
 
+
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 
 class TetranzSelect2EntityBundle extends Bundle
diff --git a/composer.json b/composer.json
index 7a23ddd..3d0707c 100644
--- a/composer.json
+++ b/composer.json
@@ -1,31 +1,38 @@
 {
-    "name": "tetranz/select2entity-bundle",
-    "type": "symfony-bundle",
-    "description": "A Symfony bundle that integrates Select2 as a drop-in replacement for a standard entity field on a Symfony form.",
-    "keywords": ["symfony","select2", "typeahead","autocomplete"],
-    "license": "MIT",
-    "authors": [
-        {
-            "name": "Ross Keatinge",
-            "email": "tetranz@gmail.com"
-        }
-    ],
-    "require": {
-        "php": ">=7.1.3",
-        "doctrine/orm": ">=2.4",
-        "twig/twig": ">=2.9",
-        "symfony/property-access": ">=4.0",
-        "symfony/dependency-injection": ">=4.0",
-        "symfony/http-kernel": ">=4.0",
-        "symfony/form": ">=4.0",
-        "symfony/config": ">=4.0",
-        "symfony/routing": ">=4.0"
-    },
-    "autoload": {
-        "psr-4": { "Tetranz\\Select2EntityBundle\\": "" }
-    },
-    "extra": {
-        "branch-alias": {
-        }
+  "name": "tetranz/select2entity-bundle",
+  "type": "symfony-bundle",
+  "description": "A Symfony bundle that integrates Select2 as a drop-in replacement for a standard entity field on a Symfony form.",
+  "keywords": [
+    "symfony",
+    "select2",
+    "typeahead",
+    "autocomplete"
+  ],
+  "license": "MIT",
+  "authors": [
+    {
+      "name": "Ross Keatinge",
+      "email": "tetranz@gmail.com"
     }
+  ],
+  "require": {
+    "php": ">=8.0",
+    "doctrine/orm": ">=2.4",
+    "twig/twig": ">=2.9",
+    "symfony/property-access": ">=4.0",
+    "symfony/dependency-injection": ">=4.0",
+    "symfony/http-kernel": ">=4.0",
+    "symfony/form": ">=4.0",
+    "symfony/config": ">=4.0",
+    "symfony/routing": ">=4.0"
+  },
+  "autoload": {
+    "psr-4": {
+      "Tetranz\\Select2EntityBundle\\": ""
+    }
+  },
+  "extra": {
+    "branch-alias": {
+    }
+  }
 }