diff --git a/custom_components/solcast_solar/manifest.json b/custom_components/solcast_solar/manifest.json
index e22e5c2c..e8f35931 100644
--- a/custom_components/solcast_solar/manifest.json
+++ b/custom_components/solcast_solar/manifest.json
@@ -10,5 +10,5 @@
   "iot_class": "cloud_polling",
   "issue_tracker": "https://github.com/BJReplay/ha-solcast-solar/issues",
   "requirements": ["aiohttp>=3.8.5", "aiofiles>=23.2.0", "datetime>=4.3", "isodate>=0.6.1"],
-  "version": "4.2.2"
+  "version": "4.2.3"
 }
diff --git a/custom_components/solcast_solar/solcastapi.py b/custom_components/solcast_solar/solcastapi.py
index 3be381e3..12bcacd7 100644
--- a/custom_components/solcast_solar/solcastapi.py
+++ b/custom_components/solcast_solar/solcastapi.py
@@ -515,6 +515,8 @@ def redact_lat_lon(s) -> str:
                                     resp_json = json.loads(await f.read())
                                     status = 200
                                     for i in resp_json['sites']:
+                                        if i.get('api_key') is None:
+                                            continue
                                         if i.get('api_key') not in sp:
                                             status = 429
                                             _LOGGER.debug("API key has changed so sites cache is invalid, not loading cached data")