diff --git a/stm-firmware/shellmatta b/stm-firmware/shellmatta
index 6c76dfc..73e8f0a 160000
--- a/stm-firmware/shellmatta
+++ b/stm-firmware/shellmatta
@@ -1 +1 @@
-Subproject commit 6c76dfc7aed2594579f09d0b797d6a51cffff343
+Subproject commit 73e8f0af036e6e35cfa696cebf35726bed8ed299