diff --git a/README.md b/README.md
index 7790e0d..b73dd9f 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 [![License](https://img.shields.io/github/license/custom-components/blueprint.svg?style=for-the-badge)](LICENSE)
 [![hacs_badge](https://img.shields.io/badge/HACS-Default-41BDF5.svg?style=for-the-badge)](https://github.com/hacs/integration)
 
-Thermia Heat Pump Integration for Home Assistant
+Thermia Heat Pump Integration for Home Assistant. Depends on [Python Thermia Online API](https://github.com/klejejs/python-thermia-online-api).
 
 _Component to integrate with [Thermia Heat Pump](https://github.com/klejejs/ha-thermia-heat-pump-integration)._
 
diff --git a/custom_components/thermia/manifest.json b/custom_components/thermia/manifest.json
index a16b468..6eca81b 100644
--- a/custom_components/thermia/manifest.json
+++ b/custom_components/thermia/manifest.json
@@ -9,7 +9,7 @@
     "@klejejs"
   ],
   "requirements": [
-    "ThermiaOnlineAPI==2.5"
+    "ThermiaOnlineAPI==2.6"
   ],
   "version": "1.0",
   "iot_class": "cloud_polling",
diff --git a/custom_components/thermia/sensors/active_alarms_sensor.py b/custom_components/thermia/sensors/active_alarms_sensor.py
index fddd26d..abe553f 100644
--- a/custom_components/thermia/sensors/active_alarms_sensor.py
+++ b/custom_components/thermia/sensors/active_alarms_sensor.py
@@ -18,7 +18,7 @@ def __init__(self, coordinator, idx):
     @property
     def available(self):
         """Return True if entity is available."""
-        return self.coordinator.data.heat_pumps[self.idx].is_online
+        return self.coordinator.data.connected
 
     @property
     def name(self):