diff --git a/Writing-a-module.md b/Writing-a-module.md
index dc5f2d1..01cdd11 100644
--- a/Writing-a-module.md
+++ b/Writing-a-module.md
@@ -12,23 +12,23 @@ def MessageBox(text, title):
 ```
 then, simply create a module to load our package and call the function remotely
 ```python
+from pupylib.PupyModule import *
+
+__class_name__="MsgBoxPopup"
+
+@compatibility("windows")
 class MsgBoxPopup(PupyModule):
 	""" Pop up a custom message box """
+	dependencies=["pupwinutils.msgbox"]
 
 	def init_argparse(self):
 		self.arg_parser = PupyArgumentParser(prog="msgbox", description=self.__doc__)
 		self.arg_parser.add_argument('--title', help='msgbox title')
 		self.arg_parser.add_argument('text', help='text to print in the msgbox :)')
 
-	@windows_only
-	def is_compatible(self):
-		pass
-
 	def run(self, args):
-		self.client.load_package("pupwinutils.msgbox")
 		self.client.conn.modules['pupwinutils.msgbox'].MessageBox(args.text, args.title)
 		self.log("message box popped !")
-
 ```
 and that's it, we have a fully functional module :)