diff --git a/pytesy/__init__.py b/pytesy/__init__.py
index f9ebb27..4886b95 100644
--- a/pytesy/__init__.py
+++ b/pytesy/__init__.py
@@ -14,7 +14,7 @@
 VERSION = __version__
 
 _LOGGER = logging.getLogger(NAME)
-TESY_URL = "https://www.mytesy.com/"
+TESY_URL = "https://www.mytesy.com/v3/api.php"
 
 class PyTesyDevice():
     def __init__(self, parent, data):
@@ -116,4 +116,4 @@ def poll(self):
                 device.update(value)
         return None
 
-  
\ No newline at end of file
+