diff --git a/src/Faker/Provider/Address.php b/src/Faker/Provider/Address.php
index c0bf67a9..8f287126 100644
--- a/src/Faker/Provider/Address.php
+++ b/src/Faker/Provider/Address.php
@@ -81,7 +81,7 @@ class Address extends \Faker\Provider\Base
 	 */
 	public static function postcode()
 	{
-		return static::bothify(static::randomElement(static::$postcode));
+		return strtoupper(static::bothify(static::randomElement(static::$postcode)));
 	}
 
 	/**