diff --git a/composer.json b/composer.json
index 8da17ad..ae012b4 100644
--- a/composer.json
+++ b/composer.json
@@ -8,7 +8,7 @@
     }
   ],
   "require": {
-    "php": "^7.1",
+    "php": "^7.1|^8.0",
     "goetas-webservices/soap-reader": "^0.3.1",
     "goetas-webservices/wsdl-reader": "^0.3",
     "goetas-webservices/xsd2php": "^0.4.1",
diff --git a/src/Generation/JmsSoapConverter.php b/src/Generation/JmsSoapConverter.php
index 9c0389e..998f773 100644
--- a/src/Generation/JmsSoapConverter.php
+++ b/src/Generation/JmsSoapConverter.php
@@ -80,7 +80,7 @@ private function visitOperation(\GoetasWebservices\XML\SOAPReader\Soap\Operation
         }
     }
 
-    private function visitMessage(OperationMessage $message, $hint = '', \GoetasWebservices\XML\SOAPReader\Soap\Operation $operation, Service $service)
+    private function visitMessage(OperationMessage $message, $hint, \GoetasWebservices\XML\SOAPReader\Soap\Operation $operation, Service $service)
     {
         if (!isset($this->classes[spl_object_hash($message)])) {
             $className = $this->findPHPName($message, Inflector::classify($hint), $this->baseNs[$service->getVersion()]['parts']);
diff --git a/src/Generation/SoapConverter.php b/src/Generation/SoapConverter.php
index 0e31f87..672ecde 100644
--- a/src/Generation/SoapConverter.php
+++ b/src/Generation/SoapConverter.php
@@ -91,7 +91,7 @@ private function visitOperation(\GoetasWebservices\XML\SOAPReader\Soap\Operation
         }
     }
 
-    private function visitMessage(OperationMessage $message, $hint = '', \GoetasWebservices\XML\SOAPReader\Soap\Operation $operation, Service $service)
+    private function visitMessage(OperationMessage $message, $hint, \GoetasWebservices\XML\SOAPReader\Soap\Operation $operation, Service $service)
     {
         if (!isset($this->classes[spl_object_hash($message)])) {
             $className = $this->findPHPName($message, Inflector::classify($hint), $this->baseNs[$service->getVersion()]['parts']);