diff --git a/stm-firmware/shellmatta b/stm-firmware/shellmatta
index 73e8f0a..1b7cdb1 160000
--- a/stm-firmware/shellmatta
+++ b/stm-firmware/shellmatta
@@ -1 +1 @@
-Subproject commit 73e8f0af036e6e35cfa696cebf35726bed8ed299
+Subproject commit 1b7cdb1acc0c8d34b10a1e4cd3ae61447c772f4a