diff --git a/src/ConstraintViolationException.php b/src/ConstraintViolationException.php
index b5a0c5d..07422e2 100644
--- a/src/ConstraintViolationException.php
+++ b/src/ConstraintViolationException.php
@@ -28,16 +28,6 @@ public function isClientSafe(): bool
         return true;
     }
 
-    /**
-     * Returns string describing a category of the error.
-     *
-     * Value "graphql" is reserved for errors produced by query parsing or validation, do not use it.
-     */
-    public function getCategory(): string
-    {
-        return 'Validate';
-    }
-
     /**
      * Returns the "extensions" object attached to the GraphQL error.
      *
@@ -45,7 +35,7 @@ public function getCategory(): string
      */
     public function getExtensions(): array
     {
-        $extensions = [];
+        $extensions = ['category' => 'Validate'];
         $code = $this->violation->getCode();
         if (! empty($code)) {
             $extensions['code'] = $code;
diff --git a/src/Mappers/Parameters/ParameterValidator.php b/src/Mappers/Parameters/ParameterValidator.php
index 39d8a2f..d328808 100644
--- a/src/Mappers/Parameters/ParameterValidator.php
+++ b/src/Mappers/Parameters/ParameterValidator.php
@@ -6,6 +6,7 @@
 
 use GraphQL\Type\Definition\InputType;
 use GraphQL\Type\Definition\ResolveInfo;
+use GraphQL\Type\Definition\Type;
 use Symfony\Component\Validator\Constraint;
 use Symfony\Component\Validator\ConstraintValidatorFactoryInterface;
 use Symfony\Component\Validator\Context\ExecutionContext;
@@ -40,13 +41,8 @@ public function __construct(InputTypeParameterInterface $parameter, string $para
         $this->translator = $translator;
     }
 
-    /**
-     * @param array<string, mixed> $args
-     * @param mixed $context
-     *
-     * @return mixed
-     */
-    public function resolve(object|null $source, array $args, $context, ResolveInfo $info)
+    /** @param array<string, mixed> $args */
+    public function resolve(object|null $source, array $args, mixed $context, ResolveInfo $info): mixed
     {
         $value = $this->parameter->resolve($source, $args, $context, $info);
 
@@ -67,7 +63,7 @@ public function resolve(object|null $source, array $args, $context, ResolveInfo
         return $value;
     }
 
-    public function getType(): InputType
+    public function getType(): InputType&Type
     {
         return $this->parameter->getType();
     }
@@ -77,8 +73,7 @@ public function hasDefaultValue(): bool
         return $this->parameter->hasDefaultValue();
     }
 
-    /** @return mixed */
-    public function getDefaultValue()
+    public function getDefaultValue(): mixed
     {
         return $this->parameter->getDefaultValue();
     }
diff --git a/tests/ConstraintValidationExceptionTest.php b/tests/ConstraintValidationExceptionTest.php
index cc89493..00af664 100644
--- a/tests/ConstraintValidationExceptionTest.php
+++ b/tests/ConstraintValidationExceptionTest.php
@@ -13,10 +13,9 @@ public function testException()
         $exception = new ConstraintViolationException(new ConstraintViolation('foo', 'foo {bar}', ['bar' => 'baz'], null, null, 'invalidValue', null, 'myCode'));
         $this->assertSame(400, $exception->getCode());
         $this->assertTrue($exception->isClientSafe());
-        $this->assertSame('Validate', $exception->getCategory());
-        $this->assertSame(['code' => 'myCode'], $exception->getExtensions());
+        $this->assertSame(['category' => 'Validate', 'code' => 'myCode'], $exception->getExtensions());
 
         $exception = new ConstraintViolationException(new ConstraintViolation('foo', 'foo {bar}', ['bar' => 'baz'], null, null, 'invalidValue'));
-        $this->assertSame([], $exception->getExtensions());
+        $this->assertSame(['category' => 'Validate'], $exception->getExtensions());
     }
 }