diff --git a/custom_components/west_wood_club/api.py b/custom_components/west_wood_club/api.py
index 5ac7195..e5beedf 100644
--- a/custom_components/west_wood_club/api.py
+++ b/custom_components/west_wood_club/api.py
@@ -9,7 +9,7 @@ from __future__ import annotations
 
 import aiohttp
 
-from .const import BASE_URL
+from .const import BASE_URL, WHITE_LABEL_ID
 
 
 class WestWoodApiError(Exception):
@@ -36,6 +36,7 @@ class WestWoodClient:
                 headers={
                     'Authorization': f'bearer {self._token}',
                     'Accept': 'application/json',
+                    'X-Go-White-Label-ID': WHITE_LABEL_ID,
                 },
             ) as resp:
                 if resp.status in (401, 403):
diff --git a/custom_components/west_wood_club/const.py b/custom_components/west_wood_club/const.py
index 487eab7..48ec7ff 100644
--- a/custom_components/west_wood_club/const.py
+++ b/custom_components/west_wood_club/const.py
@@ -11,6 +11,11 @@ DEVICE_NAME = 'West Wood Club'
 # PerfectGym Go backend (West Wood is a white-label tenant).
 BASE_URL = 'https://goapi2.perfectgym.com'
 
+# Hardcoded West Wood white-label tenant ID (baked into the app binary). Sent as
+# the X-Go-White-Label-ID header. The server doesn't require it, but it matches
+# what the app sends. See api.md.
+WHITE_LABEL_ID = '7d073db5-0ef8-4d78-89ec-4a8bebaf4cbc'
+
 # Config entry keys.
 CONF_TOKEN = 'token'
 CONF_CLUBS = 'clubs'
diff --git a/custom_components/west_wood_club/manifest.json b/custom_components/west_wood_club/manifest.json
index 660e1df..fbe1d8e 100644
--- a/custom_components/west_wood_club/manifest.json
+++ b/custom_components/west_wood_club/manifest.json
@@ -7,5 +7,5 @@
   "integration_type": "service",
   "iot_class": "cloud_polling",
   "requirements": [],
-  "version": "0.1.2"
+  "version": "0.1.3"
 }
diff --git a/flake.nix b/flake.nix
index ef9a4f2..274a3de 100644
--- a/flake.nix
+++ b/flake.nix
@@ -15,7 +15,7 @@
           west_wood_club = final.buildHomeAssistantComponent {
             owner = "deplayer0";
             domain = "west_wood_club";
-            version = "0.1.2";
+            version = "0.1.3";
             src = ./.;
           };
         };