diff --git a/CHANGELOG.md b/CHANGELOG.md
index 998b88e..b7740fb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # v4.3.0
 
+### Bugfix
+
+- [#11](https://github.com/pedro-teixeira/correios/pull/11) Assinatura do método isZipCodeRequired() foi alterada
+
 ### Feature
 
 - [#1](https://github.com/pedro-teixeira/correios/pull/1) Revisão do code style
diff --git a/app/code/community/PedroTeixeira/Correios/Model/Carrier/CorreiosMethod.php b/app/code/community/PedroTeixeira/Correios/Model/Carrier/CorreiosMethod.php
index f6628dc..4a08a6f 100644
--- a/app/code/community/PedroTeixeira/Correios/Model/Carrier/CorreiosMethod.php
+++ b/app/code/community/PedroTeixeira/Correios/Model/Carrier/CorreiosMethod.php
@@ -644,9 +644,11 @@ public function getAllowedMethods()
     /**
      * Define ZIP Code as required
      *
+     * @param string $countryId
+     *
      * @return bool
      */
-    public function isZipCodeRequired()
+    public function isZipCodeRequired($countryId = null)
     {
         return true;
     }