diff --git a/src/Web/Documentation/content/1.x/2-features/01-mapper.md b/src/Web/Documentation/content/1.x/2-features/01-mapper.md
index 8a0c4a36..035a5709 100644
--- a/src/Web/Documentation/content/1.x/2-features/01-mapper.md
+++ b/src/Web/Documentation/content/1.x/2-features/01-mapper.md
@@ -173,7 +173,7 @@ use Tempest\Mapper\Caster;
 
 final readonly class AddressCaster implements Caster
 {
-    public function cast(mixed $input): DateTimeInterface
+    public function cast(mixed $input): Address
     {
         return new Address(
             street: $input['street'],
@@ -235,4 +235,4 @@ $container->get(SerializerFactory::class)
 	->addSerializer(Address::class, AddressSerializer::class);
 ```
 
-If you're looking for the right place where to put this logic, [provider classes](/docs/extra-topics/package-development#provider-classes) is our recommendation. 
\ No newline at end of file
+If you're looking for the right place where to put this logic, [provider classes](/docs/extra-topics/package-development#provider-classes) is our recommendation.