diff --git a/boards/arm/eyelash_corne/eyelash_corne_left_defconfig b/boards/arm/eyelash_corne/eyelash_corne_left_defconfig
index 3a04fcb..f88153f 100644
--- a/boards/arm/eyelash_corne/eyelash_corne_left_defconfig
+++ b/boards/arm/eyelash_corne/eyelash_corne_left_defconfig
@@ -2,7 +2,9 @@
 # Copyright (c) 2024 The ZMK Contributors
 # SPDX-License-Identifier: MIT
 #
+CONFIG_ZMK_IDLE_SLEEP_TIMEOUT=3600000
 
+CONFIG_ZMK_SLEEP=y
 CONFIG_SOC_SERIES_NRF52X=y
 CONFIG_SOC_NRF52840_QIAA=y
 CONFIG_BOARD_EYELASH_CORNE_LEFT=y