diff --git a/README.md b/README.md
index c707d32..9f7d80a 100644
--- a/README.md
+++ b/README.md
@@ -1354,9 +1354,9 @@ class Employee
         $this->email = $email;
     }
 
-    public function setTaxData(string $ssn, string $salary)
+    public function setTaxData(EmployeeTaxData $taxData)
     {
-        $this->taxData = new EmployeeTaxData($ssn, $salary);
+        $this->taxData = $taxData;
     }
 
     // ...