diff --git a/main.c b/main.c
index e77d1f8..ad8f14a 100644
--- a/main.c
+++ b/main.c
@@ -136,7 +136,10 @@ int main(void)
             }
         }
 
+        // Sleep during delay instead of busy-wait
+        sleep_enable();
         _delay_ms(MAIN_LOOP_SLEEP);
+        sleep_disable();
     }
 }