diff --git a/NEWS.md b/NEWS.md
index 3d31ab2..17be96a 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,10 @@
+## XML-RPC for PHP EXTRAS version 1.0-beta4 - 2024/4/16
+
+- fixed: a php warning emitted by class `ReverseProxy` because of compatibility with its parent class
+
+- bumped the minimum required version of phpxmlrpc/phpxmlrpc to 4.10.1
+
+
 ## XML-RPC for PHP EXTRAS version 1.0-beta3 - 2024/4/15
 
 - bumped the minimum required version of php to 5.4
diff --git a/composer.json b/composer.json
index db7defc..41e1533 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
     "keywords": [ "xmlrpc", "webservices", "jsonrpc" ],
     "require": {
         "php": "^5.4.0 || ^7.0 || ^8.0",
-        "phpxmlrpc/phpxmlrpc": "^4.10.0"
+        "phpxmlrpc/phpxmlrpc": "^4.10.1"
     },
     "require-dev": {
         "ext-curl": "*",
diff --git a/src/ReverseProxy.php b/src/ReverseProxy.php
index bed8a98..8501fb1 100644
--- a/src/ReverseProxy.php
+++ b/src/ReverseProxy.php
@@ -132,7 +132,7 @@ public function acquireServerMethods($methodList = null)
     }
 
     // avoid checking for existing methods while parsing the request
-    public function methodNameCallback($methodName, $xmlParser, $parser)
+    public function methodNameCallback($methodName, $xmlParser, $parser = null)
     {
     }
 }