diff --git a/src/Serializer/BigNumberNormalizer.php b/src/Serializer/BigNumberNormalizer.php
index 1f310810..87619849 100644
--- a/src/Serializer/BigNumberNormalizer.php
+++ b/src/Serializer/BigNumberNormalizer.php
@@ -21,13 +21,12 @@
 namespace App\Serializer;
 
 use Brick\Math\BigNumber;
-use Symfony\Component\Serializer\Normalizer\CacheableSupportsMethodInterface;
 use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 
 /**
  * @see \App\Tests\Serializer\BigNumberNormalizerTest
  */
-class BigNumberNormalizer implements NormalizerInterface, CacheableSupportsMethodInterface
+class BigNumberNormalizer implements NormalizerInterface
 {
 
     public function supportsNormalization($data, string $format = null, array $context = []): bool
@@ -44,8 +43,10 @@ class BigNumberNormalizer implements NormalizerInterface, CacheableSupportsMetho
         return (string) $object;
     }
 
-    public function hasCacheableSupportsMethod(): bool
+    public function getSupportedTypes(?string $format)
     {
-        return true;
+        return [
+            BigNumber::class => true,
+        ];
     }
 }
\ No newline at end of file
diff --git a/src/Serializer/PartNormalizer.php b/src/Serializer/PartNormalizer.php
index 634d6335..67b4066f 100644
--- a/src/Serializer/PartNormalizer.php
+++ b/src/Serializer/PartNormalizer.php
@@ -27,16 +27,20 @@ use App\Entity\Parts\Supplier;
 use App\Entity\PriceInformations\Orderdetail;
 use App\Entity\PriceInformations\Pricedetail;
 use Brick\Math\BigDecimal;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
 use Symfony\Component\Serializer\Normalizer\CacheableSupportsMethodInterface;
 use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
 use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
 
 /**
  * @see \App\Tests\Serializer\PartNormalizerTest
  */
-class PartNormalizer implements NormalizerInterface, DenormalizerInterface, CacheableSupportsMethodInterface
+class PartNormalizer implements NormalizerInterface, DenormalizerInterface
 {
+
     private const DENORMALIZE_KEY_MAPPING = [
         'notes' => 'comment',
         'quantity' => 'instock',
@@ -47,7 +51,10 @@ class PartNormalizer implements NormalizerInterface, DenormalizerInterface, Cach
         'storage_location' => 'storelocation',
     ];
 
-    public function __construct(private readonly ObjectNormalizer $normalizer, private readonly StructuralElementFromNameDenormalizer $locationDenormalizer)
+    public function __construct(
+        private readonly StructuralElementFromNameDenormalizer $locationDenormalizer,
+        #[Autowire(service: ObjectNormalizer::class)]
+        private readonly NormalizerInterface $normalizer)
     {
     }
 
@@ -166,9 +173,11 @@ class PartNormalizer implements NormalizerInterface, DenormalizerInterface, Cach
         return $object;
     }
 
-    public function hasCacheableSupportsMethod(): bool
+    public function getSupportedTypes(?string $format)
     {
         //Must be false, because we rely on is_array($data) in supportsDenormalization()
-        return false;
+        return [
+            Part::class => false,
+        ];
     }
 }
\ No newline at end of file
diff --git a/src/Serializer/StructuralElementDenormalizer.php b/src/Serializer/StructuralElementDenormalizer.php
index 4212fd5d..c5130ef4 100644
--- a/src/Serializer/StructuralElementDenormalizer.php
+++ b/src/Serializer/StructuralElementDenormalizer.php
@@ -23,19 +23,25 @@ namespace App\Serializer;
 use App\Entity\Base\AbstractStructuralDBElement;
 use App\Repository\StructuralDBElementRepository;
 use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
 use Symfony\Component\Serializer\Normalizer\CacheableSupportsMethodInterface;
+use Symfony\Component\Serializer\Normalizer\DenormalizerAwareInterface;
+use Symfony\Component\Serializer\Normalizer\DenormalizerAwareTrait;
 use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
 use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
 
 /**
  * @see \App\Tests\Serializer\StructuralElementDenormalizerTest
  */
-class StructuralElementDenormalizer implements DenormalizerInterface, CacheableSupportsMethodInterface
+class StructuralElementDenormalizer implements DenormalizerInterface
 {
 
     private array $object_cache = [];
 
-    public function __construct(private readonly ObjectNormalizer $normalizer, private readonly EntityManagerInterface $entityManager)
+    public function __construct(
+        private readonly EntityManagerInterface $entityManager,
+        #[Autowire(service: ObjectNormalizer::class)]
+        private readonly DenormalizerInterface $denormalizer)
     {
     }
 
@@ -50,7 +56,7 @@ class StructuralElementDenormalizer implements DenormalizerInterface, CacheableS
     public function denormalize($data, string $type, string $format = null, array $context = []): ?AbstractStructuralDBElement
     {
         /** @var AbstractStructuralDBElement $deserialized_entity */
-        $deserialized_entity = $this->normalizer->denormalize($data, $type, $format, $context);
+        $deserialized_entity = $this->denormalizer->denormalize($data, $type, $format, $context);
 
         //Check if we already have the entity in the database (via path)
         /** @var StructuralDBElementRepository $repo */
@@ -81,8 +87,11 @@ class StructuralElementDenormalizer implements DenormalizerInterface, CacheableS
         return $deserialized_entity;
     }
 
-    public function hasCacheableSupportsMethod(): bool
+    public function getSupportedTypes(): array
     {
-        return false;
+        //Must be false, because we use in_array in supportsDenormalization
+        return [
+            AbstractStructuralDBElement::class => false,
+        ];
     }
 }
\ No newline at end of file
diff --git a/src/Serializer/StructuralElementFromNameDenormalizer.php b/src/Serializer/StructuralElementFromNameDenormalizer.php
index c5dbfdf2..670bcdc1 100644
--- a/src/Serializer/StructuralElementFromNameDenormalizer.php
+++ b/src/Serializer/StructuralElementFromNameDenormalizer.php
@@ -29,7 +29,7 @@ use Symfony\Component\Serializer\Normalizer\DenormalizerInterface;
 /**
  * @see \App\Tests\Serializer\StructuralElementFromNameDenormalizerTest
  */
-class StructuralElementFromNameDenormalizer implements DenormalizerInterface, CacheableSupportsMethodInterface
+class StructuralElementFromNameDenormalizer implements DenormalizerInterface
 {
     public function __construct(private readonly EntityManagerInterface $em)
     {
@@ -67,9 +67,11 @@ class StructuralElementFromNameDenormalizer implements DenormalizerInterface, Ca
         return end($elements);
     }
 
-    public function hasCacheableSupportsMethod(): bool
+    public function getSupportedTypes(?string $format)
     {
-        //Must be false, because we do an is_string check on data in supportsDenormalization
-        return false;
+        //Cachable value Must be false, because we do an is_string check on data in supportsDenormalization
+        return [
+            AbstractStructuralDBElement::class => false
+        ];
     }
 }
\ No newline at end of file
diff --git a/src/Serializer/StructuralElementNormalizer.php b/src/Serializer/StructuralElementNormalizer.php
index f71a56d5..c1931ffe 100644
--- a/src/Serializer/StructuralElementNormalizer.php
+++ b/src/Serializer/StructuralElementNormalizer.php
@@ -21,16 +21,22 @@
 namespace App\Serializer;
 
 use App\Entity\Base\AbstractStructuralDBElement;
+use Symfony\Component\DependencyInjection\Attribute\Autowire;
 use Symfony\Component\Serializer\Normalizer\CacheableSupportsMethodInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerAwareInterface;
+use Symfony\Component\Serializer\Normalizer\NormalizerAwareTrait;
 use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
 use Symfony\Component\Serializer\Normalizer\ObjectNormalizer;
 
 /**
  * @see \App\Tests\Serializer\StructuralElementNormalizerTest
  */
-class StructuralElementNormalizer implements NormalizerInterface, CacheableSupportsMethodInterface
+class StructuralElementNormalizer implements NormalizerInterface
 {
-    public function __construct(private readonly ObjectNormalizer $normalizer)
+    public function __construct(
+        #[Autowire(service: ObjectNormalizer::class)]
+        private NormalizerInterface $normalizer
+    )
     {
     }
 
@@ -57,8 +63,10 @@ class StructuralElementNormalizer implements NormalizerInterface, CacheableSuppo
         return $data;
     }
 
-    public function hasCacheableSupportsMethod(): bool
+    public function getSupportedTypes(?string $format)
     {
-        return true;
+        return [
+            AbstractStructuralDBElement::class => true,
+        ];
     }
 }
\ No newline at end of file
diff --git a/src/Validator/Constraints/ValidThemeValidator.php b/src/Validator/Constraints/ValidThemeValidator.php
index f83bb500..03e6212f 100644
--- a/src/Validator/Constraints/ValidThemeValidator.php
+++ b/src/Validator/Constraints/ValidThemeValidator.php
@@ -30,7 +30,7 @@ class ValidThemeValidator extends ConstraintValidator
     {
     }
 
-    public function validate($value, Constraint $constraint)
+    public function validate($value, Constraint $constraint): void
     {
         if (!$constraint instanceof ValidTheme) {
             throw new UnexpectedTypeException($constraint, ValidTheme::class);
diff --git a/tests/Serializer/StructuralElementDenormalizerTest.php b/tests/Serializer/StructuralElementDenormalizerTest.php
index 624b30d4..be0a9e61 100644
--- a/tests/Serializer/StructuralElementDenormalizerTest.php
+++ b/tests/Serializer/StructuralElementDenormalizerTest.php
@@ -37,11 +37,6 @@ class StructuralElementDenormalizerTest extends WebTestCase
         $this->service = self::getContainer()->get(StructuralElementDenormalizer::class);
     }
 
-    public function testHasCacheableSupportsMethod(): void
-    {
-        $this->assertFalse($this->service->hasCacheableSupportsMethod());
-    }
-
     public function testSupportsDenormalization(): void
     {
         $this->assertFalse($this->service->supportsDenormalization('doesnt_matter', Category::class, 'json', ['groups' => ['import']]));