diff --git a/scripts/requirements-extras.txt b/scripts/requirements-extras.txt
index 90200ee02f9..61167ad9b0f 100644
--- a/scripts/requirements-extras.txt
+++ b/scripts/requirements-extras.txt
@@ -14,3 +14,6 @@ lpc_checksum
 
 # used by scripts/gen_cfb_font_header.py - helper script for user
 Pillow
+
+# can be used to sign a Zephyr application binary for consumption by a bootloader
+imgtool