diff --git a/lib/zh_avr_common b/lib/zh_avr_common
index 9f03e86..728b5c6 160000
--- a/lib/zh_avr_common
+++ b/lib/zh_avr_common
@@ -1 +1 @@
-Subproject commit 9f03e866c19485fe037b3d6421a838cce7fc9efc
+Subproject commit 728b5c6d1d373600c86fa7f2697df63f8e160882
diff --git a/lib/zh_avr_pcf8574 b/lib/zh_avr_pcf8574
index dfebb15..196398a 160000
--- a/lib/zh_avr_pcf8574
+++ b/lib/zh_avr_pcf8574
@@ -1 +1 @@
-Subproject commit dfebb15213e1c74e54b7bb142cc9d0e706511269
+Subproject commit 196398ac6fe9026384036924bc1d26f0e22583b7