diff --git a/WifiControlSensor/config_device.h b/WifiControlSensor/config_device.h
index e3588a0..78aac70 100644
--- a/WifiControlSensor/config_device.h
+++ b/WifiControlSensor/config_device.h
@@ -20,7 +20,7 @@
 //#define CONFIG_DRY_POWER_PIN 13
 
 // Enable light sleep to save some power (http://bbs.espressif.com/viewtopic.php?f=6&t=133&p=485&hilit=sleep+modem#p485)
-//#define CONFIG_ENABLE_POWER_SAVE
+#define CONFIG_ENABLE_POWER_SAVE
 
 // Disable mDNS can also save power
 #define CONFIG_ENABLE_MDNS