diff --git a/composer.json b/composer.json
index dd0012f..3954b86 100644
--- a/composer.json
+++ b/composer.json
@@ -27,7 +27,7 @@
     "require": {
         "php": "^8.2",
         "symfony/framework-bundle": "^5.0|^6.0|^7.0",
-        "symfony/serializer": "^5.1.8|^6.0",
+        "symfony/serializer": "^5.1.8|^6.0|^7.0",
         "beberlei/assert": "^3.2.7"
     },
     "config": {
diff --git a/src/Normalizer/AbsolutePercentValueNormalizer.php b/src/Normalizer/AbsolutePercentValueNormalizer.php
index 570967a..37039ca 100644
--- a/src/Normalizer/AbsolutePercentValueNormalizer.php
+++ b/src/Normalizer/AbsolutePercentValueNormalizer.php
@@ -22,7 +22,7 @@ class AbsolutePercentValueNormalizer implements NormalizerInterface, Denormalize
      * @return mixed[]
      * @throws InvalidArgumentException
      */
-    public function normalize($object, string $format = null, array $context = []): array
+    public function normalize(mixed $object, ?string $format = null, array $context = []): array
     {
         if (!$object instanceof AbsolutePercentValue) {
             throw new InvalidArgumentException(sprintf(
@@ -39,25 +39,27 @@ public function normalize($object, string $format = null, array $context = []):
 
     /**
      * @param mixed $data
+     * @param array<mixed> $context
      */
-    public function supportsNormalization($data, string $format = null): bool
+    public function supportsNormalization(mixed $data, ?string $format = null, array $context = []): bool
     {
         return $data instanceof AbsolutePercentValue;
     }
 
     /**
-     * @param mixed $data
-     * @param array<mixed> $context
-     *
      * @throws NotNormalizableValueException
      */
-    public function denormalize($data, string $type, string $format = null, array $context = []): ?AbsolutePercentValue
-    {
+    public function denormalize(
+        mixed $data,
+        string $type,
+        ?string $format = null,
+        array $context = []
+    ): mixed {
         try {
             if ('' === $data || null === $data) {
-                return null;
+                throw new NotNormalizableValueException();
             }
-            return  new AbsolutePercentValue($data['type'], $data['value']);
+            return new AbsolutePercentValue($data['type'], $data['value']);
         } catch (\Exception $e) {
             throw new NotNormalizableValueException($e->getMessage(), $e->getCode(), $e);
         }
@@ -65,9 +67,22 @@ public function denormalize($data, string $type, string $format = null, array $c
 
     /**
      * @param mixed $data
+     * @param array<mixed> $context
      */
-    public function supportsDenormalization($data, string $type, string $format = null): bool
-    {
+    public function supportsDenormalization(
+        mixed $data,
+        string $type,
+        ?string $format = null,
+        array $context = []
+    ): bool {
         return $type === AbsolutePercentValue::class;
     }
+
+    /**
+     * @return array<class-string, bool>
+     */
+    public function getSupportedTypes(?string $format): array
+    {
+        return [AbsolutePercentValue::class => false];
+    }
 }
diff --git a/tests/Normalizer/AbsolutePercentValueNormalizerTest.php b/tests/Normalizer/AbsolutePercentValueNormalizerTest.php
index 0c0e426..c3289bb 100644
--- a/tests/Normalizer/AbsolutePercentValueNormalizerTest.php
+++ b/tests/Normalizer/AbsolutePercentValueNormalizerTest.php
@@ -65,10 +65,10 @@ public function testSupportsDenormalization(string $type, bool $result): void
     /**
      * @dataProvider providerTestDenormalize
      */
-    public function testDenormalizeNull(?string $data): void
+    public function testDenormalizeFailure(mixed $data): void
     {
-        $value = $this->valueNormalizer->denormalize($data, AbsolutePercentValue::class);
-        self::assertNull($value);
+        $this->expectException(NotNormalizableValueException::class);
+        $this->valueNormalizer->denormalize($data, AbsolutePercentValue::class);
     }
 
     /** @return iterable<mixed> */
@@ -76,6 +76,7 @@ public function providerTestDenormalize(): iterable
     {
         yield [''];
         yield [null];
+        yield [['type' => AbsolutePercentValue::TYPE_ABSOLUTE]];
     }
 
     public function testDenormalizeSuccess(): void
@@ -83,15 +84,7 @@ public function testDenormalizeSuccess(): void
         $data = ['type' => AbsolutePercentValue::TYPE_ABSOLUTE, 'value' => '2000'];
         $value = $this->valueNormalizer->denormalize($data, AbsolutePercentValue::class);
 
-        self::assertNotNull($value);
         self::assertSame($data['type'], $value->getType());
         self::assertSame($data['value'], $value->getValue());
     }
-
-    public function testDenormalizeFailure(): void
-    {
-        $data = ['type' => AbsolutePercentValue::TYPE_ABSOLUTE];
-        $this->expectException(NotNormalizableValueException::class);
-        $this->valueNormalizer->denormalize($data, AbsolutePercentValue::class);
-    }
 }