diff --git a/README.md b/README.md
index f0ac0da..86c075f 100644
--- a/README.md
+++ b/README.md
@@ -75,7 +75,7 @@ The WebsocketServer can be initialized with the below parameters.
 | `set_fn_new_client()`       | Sets a callback function that will be called for every new `client` connecting to us  | function        | None  |
 | `set_fn_client_left()`      | Sets a callback function that will be called for every `client` disconnecting from us | function        | None  |
 | `set_fn_message_received()` | Sets a callback function that will be called when a `client` sends a message          | function        | None  |
-| `send_message()`            | Sends a `message` to a specific `client`. The message is a simple string.             | client, message | None  |
+| `send_message()`            | Sends a `message` to a specific `client`. The message is a simple string.             | client, message, args | None  |
 | `send_message_to_all()`     | Sends a `message` to **all** connected clients. The message is a simple string.       | message         | None  |
 | `disconnect_clients_gracefully()` | Disconnect all connected clients by sending a websocket CLOSE handshake.        | Optional: status, reason | None  |
 | `disconnect_clients_abruptly()`   | Disconnect all connected clients. Clients won't be aware until they try to send some data. | None | None  |
diff --git a/websocket_server/websocket_server.py b/websocket_server/websocket_server.py
index 083ee17..0cf4e63 100644
--- a/websocket_server/websocket_server.py
+++ b/websocket_server/websocket_server.py
@@ -62,7 +62,7 @@ def new_client(self, client, server):
     def client_left(self, client, server):
         pass
 
-    def message_received(self, client, server, message):
+    def message_received(self, client, server, message, args=None):
         pass
 
     def set_fn_new_client(self, fn):
@@ -71,8 +71,9 @@ def set_fn_new_client(self, fn):
     def set_fn_client_left(self, fn):
         self.client_left = fn
 
-    def set_fn_message_received(self, fn):
+    def set_fn_message_received(self, fn, args=None):
         self.message_received = fn
+        self.message_received_args = args
 
     def send_message(self, client, msg):
         self._unicast(client, msg)
@@ -160,7 +161,7 @@ def _run_forever(self, threaded):
             sys.exit(1)
 
     def _message_received_(self, handler, msg):
-        self.message_received(self.handler_to_client(handler), self, msg)
+        self.message_received(self.handler_to_client(handler), self, msg, self.message_received_args)
 
     def _ping_received_(self, handler, msg):
         handler.send_pong(msg)