diff --git a/cubesatsim/cubesatsim.ino b/cubesatsim/cubesatsim.ino
index 8b1101b4..26a6c9d9 100644
--- a/cubesatsim/cubesatsim.ino
+++ b/cubesatsim/cubesatsim.ino
@@ -46,7 +46,7 @@
 #include "pico/bootrom.h"
 #include "hardware/watchdog.h"
 #include "pico/stdlib.h"
-#include "pico_extras/sleep.h"
+#include "pico_sleep/sleep.h"
 
 // jpg files to be stored in flash storage on Pico (FS 512kB setting)
 //#include "sstv1.h"