Priority: required -> Priority: optional

Change-Id: I7e4e8d0be53da5998c3ef5a76e13889f388aaebe
diff --git a/debian/control b/debian/control
index 1432ffd..edf5d6f 100644
--- a/debian/control
+++ b/debian/control
@@ -6,7 +6,7 @@
 
 Package: aiy-board-tools
 Section: misc
-Priority: required
+Priority: optional
 Architecture: all
 Depends: python3-minimal
 Description: Miscellaneous tools to support the AIY Board