diff --git a/firmware/atmega/source/main.c b/firmware/atmega/source/main.c
index e3bd5ac..4bdb821 100644
--- a/firmware/atmega/source/main.c
+++ b/firmware/atmega/source/main.c
@@ -20,7 +20,7 @@ void watchdogs(void) {
 }
 
 void enterSleep(void) {
-    set_sleep_mode(SLEEP_MODE_IDLE);
+    set_sleep_mode(SLEEP_MODE_PWR_DOWN);
     sleep_enable();
     sleep_cpu();
     sleep_disable();