diff --git a/src/Money/BigDecimalType.php b/src/Money/BigDecimalType.php
index 33725bf..0cee041 100644
--- a/src/Money/BigDecimalType.php
+++ b/src/Money/BigDecimalType.php
@@ -5,19 +5,11 @@
 use Brick\Math\BigDecimal;
 use Doctrine\DBAL\Platforms\AbstractPlatform;
 
-final class BigDecimalType extends \Doctrine\DBAL\Types\Type
+final class BigDecimalType extends \Doctrine\DBAL\Types\StringType
 {
 
 	public const NAME = 'big_decimal';
 
-	/**
-	 * @param string[] $fieldDeclaration
-	 */
-	public function getSQLDeclaration(array $fieldDeclaration, AbstractPlatform $platform): string
-	{
-		return $platform->getDecimalTypeDeclarationSQL($fieldDeclaration);
-	}
-
 	/**
 	 * @param mixed $value
 	 */
diff --git a/tests/DoctrineTypes/Money/BigDecimalTypeTest.phpt b/tests/DoctrineTypes/Money/BigDecimalTypeTest.phpt
index 9b30e03..a30fe30 100644
--- a/tests/DoctrineTypes/Money/BigDecimalTypeTest.phpt
+++ b/tests/DoctrineTypes/Money/BigDecimalTypeTest.phpt
@@ -22,7 +22,7 @@ final class BigDecimalTypeTest extends \Tester\TestCase
 	{
 		$type = Type::getType(BigDecimalType::NAME);
 
-		Assert::same('NUMERIC(10, 0)', $type->getSQLDeclaration([], new Platform()));
+		Assert::same('VARCHAR(255)', $type->getSQLDeclaration([], new Platform()));
 	}
 
 	public function testConvertToPhpValue(): void