diff --git a/smarttub/api.py b/smarttub/api.py
index 5c43c78..c8c291e 100644
--- a/smarttub/api.py
+++ b/smarttub/api.py
@@ -162,7 +162,7 @@ def __str__(self):
 
 
 class Spa:
-    HeatMode = Enum("HeatMode", "ECONOMY DAY AUTO READY REST")
+    HeatMode = Enum("HeatMode", "ECONOMY DAY NIGHT AUTO READY REST")
     TemperatureFormat = Enum("TemperatureFormat", "FAHRENHEIT CELSIUS")
     EnergyUsageInterval = Enum("EnergyUsageInterval", "DAY MONTH")