diff --git a/Zway/Interfaces/ACommandClass.cs b/Zway/Interfaces/ACommandClass.cs
index 63d0ff1..b084dd8 100644
--- a/Zway/Interfaces/ACommandClass.cs
+++ b/Zway/Interfaces/ACommandClass.cs
@@ -23,6 +23,7 @@ namespace BlubbFish.IoT.Zway.Interfaces {
       SwitchColor = 51,
       MeterPulse = 53,
       MeterTableMonitor = 61,
+      ThermostatOperatingState = 66,
       CRC16 = 86,
       AssociationGroupInformation = 89,
       DeviceResetLocally = 90,
diff --git a/Zway/bin/Release/Iot-Interfaces.dll b/Zway/bin/Release/Iot-Interfaces.dll
index ab8e8c7..d2ff09d 100644
Binary files a/Zway/bin/Release/Iot-Interfaces.dll and b/Zway/bin/Release/Iot-Interfaces.dll differ
diff --git a/Zway/bin/Release/LitJson.dll b/Zway/bin/Release/LitJson.dll
index b47866c..0d437c1 100644
Binary files a/Zway/bin/Release/LitJson.dll and b/Zway/bin/Release/LitJson.dll differ
diff --git a/Zway/bin/Release/Zway.dll b/Zway/bin/Release/Zway.dll
index cdcf022..afd5cb8 100644
Binary files a/Zway/bin/Release/Zway.dll and b/Zway/bin/Release/Zway.dll differ