diff --git a/scripts/erase-mcu.jlink b/scripts/erase-mcu.jlink
index 0e37aa5..c8256cf 100644
--- a/scripts/erase-mcu.jlink
+++ b/scripts/erase-mcu.jlink
@@ -1,5 +1,6 @@
 speed 4000
 device MK22FN512xxx12
+unlock Kinetis
 connect
 erase
 exit